1046729 Commits

Author SHA1 Message Date
Xie Yongji
4a7c655064 aio: Fix incorrect usage of eventfd_signal_allowed()
commit 4b3749865374899e115aa8c48681709b086fe6d3 upstream.

We should defer eventfd_signal() to the workqueue when
eventfd_signal_allowed() return false rather than return
true.

Fixes: b542e383d8c0 ("eventfd: Make signal recursion protection a task bit")
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Link: https://lore.kernel.org/r/20210913111928.98-1-xieyongji@bytedance.com
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:22 +01:00
Pali Rohár
d99d861ce3 irqchip/armada-370-xp: Fix support for Multi-MSI interrupts
commit d0a553502efd545c1ce3fd08fc4d423f8e4ac3d6 upstream.

irq-armada-370-xp driver already sets MSI_FLAG_MULTI_PCI_MSI flag into
msi_domain_info structure. But allocated interrupt numbers for Multi-MSI
needs to be properly aligned otherwise devices send MSI interrupt with
wrong number.

Fix this issue by using function bitmap_find_free_region() instead of
bitmap_find_next_zero_area() to allocate aligned interrupt numbers.

Signed-off-by: Pali Rohár <pali@kernel.org>
Fixes: a71b9412c90c ("irqchip/armada-370-xp: Allow allocation of multiple MSIs")
Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211125130057.26705-2-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:22 +01:00
Pali Rohár
97912b97fd irqchip/armada-370-xp: Fix return value of armada_370_xp_msi_alloc()
commit ce20eff57361e72878a772ef08b5239d3ae102b6 upstream.

IRQ domain alloc function should return zero on success. Non-zero value
indicates failure.

Signed-off-by: Pali Rohár <pali@kernel.org>
Fixes: fcc392d501bd ("irqchip/armada-370-xp: Use the generic MSI infrastructure")
Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211125130057.26705-1-pali@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:22 +01:00
Billy Tsai
f2675399eb irqchip/aspeed-scu: Replace update_bits with write_bits.
commit 8958389681b929fcc7301e7dc5f0da12e4a256a0 upstream.

The interrupt status bits are cleared by writing 1, we should force a
write to clear the interrupt without checking if the value has changed.

Fixes: 04f605906ff0 ("irqchip: Add Aspeed SCU interrupt controller")
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211124094348.11621-1-billy_tsai@aspeedtech.com
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:22 +01:00
Kelly Devilliv
e18f3e046c csky: fix typo of fpu config macro
commit a0793fdad9a11a32bc6d21317c93c83f4aa82ebc upstream.

Fix typo which will cause fpe and privilege exception error.

Signed-off-by: Kelly Devilliv <kelly.devilliv@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:22 +01:00
Loic Poulain
47b355f25b bus: mhi: core: Add support for forced PM resume
commit cab2d3fd6866e089b5c50db09dece131f85bfebd upstream.

For whatever reason, some devices like QCA6390, WCN6855 using ath11k
are not in M3 state during PM resume, but still functional. The
mhi_pm_resume should then not fail in those cases, and let the higher
level device specific stack continue resuming process.

Add an API mhi_pm_resume_force(), to force resuming irrespective of the
current MHI state. This fixes a regression with non functional ath11k WiFi
after suspend/resume cycle on some machines.

Bug report: https://bugzilla.kernel.org/show_bug.cgi?id=214179

Link: https://lore.kernel.org/regressions/871r5p0x2u.fsf@codeaurora.org/
Fixes: 020d3b26c07a ("bus: mhi: Early MHI resume failure in non M3 state")
Cc: stable@vger.kernel.org #5.13
Reported-by: Kalle Valo <kvalo@codeaurora.org>
Reported-by: Pengyu Ma <mapengyu@gmail.com>
Tested-by: Kalle Valo <kvalo@kernel.org>
Acked-by: Kalle Valo <kvalo@kernel.org>
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
[mani: Switched to API, added bug report, reported-by tags and CCed stable]
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211209131633.4168-1-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:22 +01:00
Slark Xiao
7f4b37c7a6 bus: mhi: pci_generic: Fix device recovery failed issue
commit e2022cbec9c2606514c4edc4a760e3acb7419d8a upstream.

For Foxconn T99W175 device(sdx55 platform) in some host platform,
it would be unavailable once the host execute the err handler.

After checking, it's caused by the delay time too short to
get a successful reset.

Please see my test evidence as bewlow(BTW, I add some extra test logs
in function mhi_pci_reset_prepare and mhi_pci_reset_done):
  When MHI_POST_RESET_DELAY_MS equals to 500ms:
   Nov  4 14:30:03 jbd-ThinkEdge kernel: [  146.222477] mhi mhi0: Device MHI is not in valid state
   Nov  4 14:30:03 jbd-ThinkEdge kernel: [  146.222628] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare reset
   Nov  4 14:30:03 jbd-ThinkEdge kernel: [  146.222631] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare mhi_soc_reset
   Nov  4 14:30:03 jbd-ThinkEdge kernel: [  146.222632] mhi mhi0:  mhi_soc_reset write soc to reset
   Nov  4 14:30:05 jbd-ThinkEdge kernel: [  147.839993] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_done
   Nov  4 14:30:05 jbd-ThinkEdge kernel: [  147.902063] mhi-pci-generic 0000:2d:00.0: reset failed

  When MHI_POST_RESET_DELAY_MS equals to 1000ms or 1500ms:
   Nov  4 19:07:26 jbd-ThinkEdge kernel: [  157.067857] mhi mhi0: Device MHI is not in valid state
   Nov  4 19:07:26 jbd-ThinkEdge kernel: [  157.068029] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare reset
   Nov  4 19:07:26 jbd-ThinkEdge kernel: [  157.068032] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare mhi_soc_reset
   Nov  4 19:07:26 jbd-ThinkEdge kernel: [  157.068034] mhi mhi0:  mhi_soc_reset write soc to reset
   Nov  4 19:07:29 jbd-ThinkEdge kernel: [  159.607006] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_done
   Nov  4 19:07:29 jbd-ThinkEdge kernel: [  159.607152] mhi mhi0: Requested to power ON
   Nov  4 19:07:51 jbd-ThinkEdge kernel: [  181.302872] mhi mhi0: Failed to reset MHI due to syserr state
   Nov  4 19:07:51 jbd-ThinkEdge kernel: [  181.303011] mhi-pci-generic 0000:2d:00.0: failed to power up MHI controller

  When MHI_POST_RESET_DELAY_MS equals to 2000ms:
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180527] mhi mhi0: Failed to transition from PM state: Linkdown or Error Fatal Detect to: SYS ERROR Process
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180535] mhi mhi0: Device MHI is not in valid state
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180722] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare reset
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180725] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_prepare mhi_soc_reset
   Nov  4 17:51:08 jbd-ThinkEdge kernel: [  147.180727] mhi mhi0:  mhi_soc_reset write soc to reset
   Nov  4 17:51:11 jbd-ThinkEdge kernel: [  150.230787] mhi-pci-generic 0000:2d:00.0: mhi_pci_reset_done
   Nov  4 17:51:11 jbd-ThinkEdge kernel: [  150.230928] mhi mhi0: Requested to power ON
   Nov  4 17:51:11 jbd-ThinkEdge kernel: [  150.231173] mhi mhi0: Power on setup success
   Nov  4 17:51:14 jbd-ThinkEdge kernel: [  153.254747] mhi mhi0: Wait for device to enter SBL or Mission mode

I also tried big data like 3000, and it worked as well. 500ms may not be
enough for all support mhi device. We shall increase it to 2000ms
at least.

Link: https://lore.kernel.org/r/20211108113127.3938-1-slark_xiao@163.com
[mani: massaged commit message little bit, added Fixes tag and CCed stable]
Fixes: 8ccc3279fcad ("mhi: pci_generic: Add support for reset")
Cc: stable@vger.kernel.org
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Slark Xiao <slark_xiao@163.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://lore.kernel.org/r/20211126104951.35685-2-manivannan.sadhasivam@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:22 +01:00
Ralph Siemsen
5bff8dff8e nvmem: eeprom: at25: fix FRAM byte_len
commit 9a626577398c24ecab63c0a684436c8928092367 upstream.

Commit fd307a4ad332 ("nvmem: prepare basics for FRAM support") added
support for FRAM devices such as the Cypress FM25V. During testing, it
was found that the FRAM detects properly, however reads and writes fail.
Upon further investigation, two problem were found in at25_probe() routine.

1) In the case of an FRAM device without platform data, eg.
       fram == true && spi->dev.platform_data == NULL
the stack local variable "struct spi_eeprom chip" is not initialized
fully, prior to being copied into at25->chip. The chip.flags field in
particular can cause problems.

2) The byte_len of FRAM is computed from its ID register, and is stored
into the stack local "struct spi_eeprom chip" structure. This happens
after the same structure has been copied into at25->chip. As a result,
at25->chip.byte_len does not contain the correct length of the device.
In turn this can cause checks at beginning of at25_ee_read() to fail
(or equally, it could allow reads beyond the end of the device length).

Fix both of these issues by eliminating the on-stack struct spi_eeprom.
Instead use the one inside at25_data structure, which starts of zeroed.

Fixes: fd307a4ad332 ("nvmem: prepare basics for FRAM support")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ralph Siemsen <ralph.siemsen@linaro.org>
Link: https://lore.kernel.org/r/20211108181627.645638-1-ralph.siemsen@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:22 +01:00
Kai-Heng Feng
990bbe3578 misc: rtsx: Avoid mangling IRQ during runtime PM
commit 0edeb8992db8e7de9b8fe3164ace9a4356b17021 upstream.

After commit 5b4258f6721f ("misc: rtsx: rts5249 support runtime PM"), when the
rtsx controller is runtime suspended, bring CPUs offline and back online, the
runtime resume of the controller will fail:

[   47.319391] smpboot: CPU 1 is now offline
[   47.414140] x86: Booting SMP configuration:
[   47.414147] smpboot: Booting Node 0 Processor 1 APIC 0x2
[   47.571334] smpboot: CPU 2 is now offline
[   47.686055] smpboot: Booting Node 0 Processor 2 APIC 0x4
[   47.808174] smpboot: CPU 3 is now offline
[   47.878146] smpboot: Booting Node 0 Processor 3 APIC 0x6
[   48.003679] smpboot: CPU 4 is now offline
[   48.086187] smpboot: Booting Node 0 Processor 4 APIC 0x1
[   48.239627] smpboot: CPU 5 is now offline
[   48.326059] smpboot: Booting Node 0 Processor 5 APIC 0x3
[   48.472193] smpboot: CPU 6 is now offline
[   48.574181] smpboot: Booting Node 0 Processor 6 APIC 0x5
[   48.743375] smpboot: CPU 7 is now offline
[   48.838047] smpboot: Booting Node 0 Processor 7 APIC 0x7
[   48.965447] __common_interrupt: 1.35 No irq handler for vector
[   51.174065] mmc0: error -110 doing runtime resume
[   54.978088] I/O error, dev mmcblk0, sector 21479 op 0x1:(WRITE) flags 0x0 phys_seg 11 prio class 0
[   54.978108] Buffer I/O error on dev mmcblk0p1, logical block 19431, lost async page write
[   54.978129] Buffer I/O error on dev mmcblk0p1, logical block 19432, lost async page write
[   54.978134] Buffer I/O error on dev mmcblk0p1, logical block 19433, lost async page write
[   54.978137] Buffer I/O error on dev mmcblk0p1, logical block 19434, lost async page write
[   54.978141] Buffer I/O error on dev mmcblk0p1, logical block 19435, lost async page write
[   54.978145] Buffer I/O error on dev mmcblk0p1, logical block 19436, lost async page write
[   54.978148] Buffer I/O error on dev mmcblk0p1, logical block 19437, lost async page write
[   54.978152] Buffer I/O error on dev mmcblk0p1, logical block 19438, lost async page write
[   54.978155] Buffer I/O error on dev mmcblk0p1, logical block 19439, lost async page write
[   54.978160] Buffer I/O error on dev mmcblk0p1, logical block 19440, lost async page write
[   54.978244] mmc0: card aaaa removed
[   54.978452] FAT-fs (mmcblk0p1): FAT read failed (blocknr 4257)

There's interrupt immediately raised on rtsx_pci_write_register() in
runtime resume routine, but the IRQ handler hasn't registered yet.

So we can either move rtsx_pci_write_register() after rtsx_pci_acquire_irq(),
or just stop mangling IRQ on runtime PM. Choose the latter to save some
CPU cycles.

Fixes: 5b4258f6721f ("misc: rtsx: rts5249 support runtime PM")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
BugLink: https://bugs.launchpad.net/bugs/1951784
Link: https://lore.kernel.org/r/20211126003246.1068770-1-kai.heng.feng@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:22 +01:00
Yang Yingliang
14508fe13b iio: accel: kxcjk-1013: Fix possible memory leak in probe and remove
commit 70c9774e180d151abaab358108e3510a8e615215 upstream.

When ACPI type is ACPI_SMO8500, the data->dready_trig will not be set, the
memory allocated by iio_triggered_buffer_setup() will not be freed, and cause
memory leak as follows:

unreferenced object 0xffff888009551400 (size 512):
  comm "i2c-SMO8500-125", pid 911, jiffies 4294911787 (age 83.852s)
  hex dump (first 32 bytes):
    02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 20 e2 e5 c0 ff ff ff ff  ........ .......
  backtrace:
    [<0000000041ce75ee>] kmem_cache_alloc_trace+0x16d/0x360
    [<000000000aeb17b0>] iio_kfifo_allocate+0x41/0x130 [kfifo_buf]
    [<000000004b40c1f5>] iio_triggered_buffer_setup_ext+0x2c/0x210 [industrialio_triggered_buffer]
    [<000000004375b15f>] kxcjk1013_probe+0x10c3/0x1d81 [kxcjk_1013]

Fix it by remove data->dready_trig condition in probe and remove.

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: a25691c1f967 ("iio: accel: kxcjk1013: allow using an external trigger")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Cc: <Stable@vger.kernel.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20211025124159.2700301-1-yangyingliang@huawei.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Lars-Peter Clausen
2906867da4 iio: ad7768-1: Call iio_trigger_notify_done() on error
commit 6661146427cbbce6d1fe3dbb11ff1c487f55799a upstream.

IIO trigger handlers must call iio_trigger_notify_done() when done. This
must be done even when an error occurred. Otherwise the trigger will be
seen as busy indefinitely and the trigger handler will never be called
again.

The ad7768-1 driver neglects to call iio_trigger_notify_done() when there
is an error reading the converter data. Fix this by making sure that
iio_trigger_notify_done() is included in the error exit path.

Fixes: a5f8c7da3dbe ("iio: adc: Add AD7768-1 ADC basic support")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211101144055.13858-2-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Evgeny Boger
b3a4c57a96 iio: adc: axp20x_adc: fix charging current reporting on AXP22x
commit 92beafb76a31bdc02649eb44e93a8e4f4cfcdbe8 upstream.

Both the charging and discharging currents on AXP22x are stored as
12-bit integers, in accordance with the datasheet.
It's also confirmed by vendor BSP (axp20x_adc.c:axp22_icharge_to_mA).

The scale factor of 0.5 is never mentioned in datasheet, nor in the
vendor source code. I think it was here to compensate for
erroneous addition bit in register width.

Tested on custom A40i+AXP221s board with external ammeter as
a reference.

Fixes: 0e34d5de961d ("iio: adc: add support for X-Powers AXP20X and AXP22X PMICs ADCs")
Signed-off-by: Evgeny Boger <boger@wirenboard.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Link: https://lore.kernel.org/r/20211116213746.264378-1-boger@wirenboard.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Fabrice Gasnier
41d241ad3e iio: adc: stm32: fix a current leak by resetting pcsel before disabling vdda
commit f711f28e71e965c0d1141c830fa7131b41abbe75 upstream.

Some I/Os are connected to ADC input channels, when the corresponding bit
in PCSEL register are set on STM32H7 and STM32MP15. This is done in the
prepare routine of stm32-adc driver.
There are constraints here, as PCSEL shouldn't be set when VDDA supply
is disabled. Enabling/disabling of VDDA supply in done via stm32-adc-core
runtime PM routines (before/after ADC is enabled/disabled).

Currently, PCSEL remains set when disabling ADC. Later on, PM runtime
can disable the VDDA supply. This creates some conditions on I/Os that
can start to leak current.
So PCSEL needs to be cleared when disabling the ADC.

Fixes: 95e339b6e85d ("iio: adc: stm32: add support for STM32H7")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Reviewed-by: Olivier Moysan <olivier.moysan@foss.st.com>
Link: https://lore.kernel.org/r/1634905169-23762-1-git-send-email-fabrice.gasnier@foss.st.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Gwendal Grignou
4071943a53 iio: at91-sama5d2: Fix incorrect sign extension
commit 652e7df485c6884d552085ae2c73efa6cfea3547 upstream.

Use scan_type when processing raw data which also fixes that the sign
extension was from the wrong bit.

Use channel definition as root of trust and replace constant
when reading elements directly using the raw sysfs attributes.

Fixes: 6794e23fa3fe ("iio: adc: at91-sama5d2_adc: add support for oversampling resolution")
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Eugen Hristev <eugen.hristev@microchip.com>
Cc: <Stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211104082413.3681212-9-gwendal@chromium.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Lars-Peter Clausen
a862c731f7 iio: dln2: Check return value of devm_iio_trigger_register()
commit 90751fb9f224e0e1555b49a8aa9e68f6537e4cec upstream.

Registering a trigger can fail and the return value of
devm_iio_trigger_register() must be checked. Otherwise undefined behavior
can occur when the trigger is used.

Fixes: 7c0299e879dd ("iio: adc: Add support for DLN2 ADC")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211101133043.6974-1-lars@metafoo.de
Cc: <stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Noralf Trønnes
9b4e3b804c iio: dln2-adc: Fix lockdep complaint
commit 59f92868176f191eefde70d284bdfc1ed76a84bc upstream.

When reading the voltage:

$ cat /sys/bus/iio/devices/iio\:device0/in_voltage0_raw

Lockdep complains:

[  153.910616] ======================================================
[  153.916918] WARNING: possible circular locking dependency detected
[  153.923221] 5.14.0+ #5 Not tainted
[  153.926692] ------------------------------------------------------
[  153.932992] cat/717 is trying to acquire lock:
[  153.937525] c2585358 (&indio_dev->mlock){+.+.}-{3:3}, at: iio_device_claim_direct_mode+0x28/0x44
[  153.946541]
               but task is already holding lock:
[  153.952487] c2585860 (&dln2->mutex){+.+.}-{3:3}, at: dln2_adc_read_raw+0x94/0x2bc [dln2_adc]
[  153.961152]
               which lock already depends on the new lock.

Fix this by not calling into the iio core underneath the dln2->mutex lock.

Fixes: 7c0299e879dd ("iio: adc: Add support for DLN2 ADC")
Cc: Jack Andersen <jackoalan@gmail.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Link: https://lore.kernel.org/r/20211018113731.25723-1-noralf@tronnes.org
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Lars-Peter Clausen
363e1286cf iio: itg3200: Call iio_trigger_notify_done() on error
commit 67fe29583e72b2103abb661bb58036e3c1f00277 upstream.

IIO trigger handlers must call iio_trigger_notify_done() when done. This
must be done even when an error occurred. Otherwise the trigger will be
seen as busy indefinitely and the trigger handler will never be called
again.

The itg3200 driver neglects to call iio_trigger_notify_done() when there is
an error reading the gyro data. Fix this by making sure that
iio_trigger_notify_done() is included in the error exit path.

Fixes: 9dbf091da080 ("iio: gyro: Add itg3200")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211101144055.13858-1-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Lars-Peter Clausen
e4b600ac98 iio: kxsd9: Don't return error code in trigger handler
commit 45febe0d63917ee908198c5be08511c64ee1790a upstream.

IIO trigger handlers need to return one of the irqreturn_t values.
Returning an error code is not supported.

The kxsd9 interrupt handler returns an error code if reading the data
registers fails. In addition when exiting due to an error the trigger
handler does not call `iio_trigger_notify_done()`. Which when not done
keeps the triggered disabled forever.

Modify the code so that the function returns a valid irqreturn_t value as
well as calling `iio_trigger_notify_done()` on all exit paths.

Since we can't return the error code make sure to at least log it as part
of the error message.

Fixes: 0427a106a98a ("iio: accel: kxsd9: Add triggered buffer handling")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20211024171251.22896-2-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Lars-Peter Clausen
5df9c2c0e4 iio: ltr501: Don't return error code in trigger handler
commit ef9d67fa72c1b149a420587e435a3e888bdbf74f upstream.

IIO trigger handlers need to return one of the irqreturn_t values.
Returning an error code is not supported.

The ltr501 interrupt handler gets this right for most error paths, but
there is one case where it returns the error code.

In addition for this particular case the trigger handler does not call
`iio_trigger_notify_done()`. Which when not done keeps the triggered
disabled forever.

Modify the code so that the function returns a valid irqreturn_t value as
well as calling `iio_trigger_notify_done()` on all exit paths.

Fixes: 2690be905123 ("iio: Add Lite-On ltr501 ambient light / proximity sensor driver")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211024171251.22896-1-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:21 +01:00
Lars-Peter Clausen
c43517071d iio: mma8452: Fix trigger reference couting
commit cd0082235783f814241a1c9483fb89e405f4f892 upstream.

The mma8452 driver directly assigns a trigger to the struct iio_dev. The
IIO core when done using this trigger will call `iio_trigger_put()` to drop
the reference count by 1.

Without the matching `iio_trigger_get()` in the driver the reference count
can reach 0 too early, the trigger gets freed while still in use and a
use-after-free occurs.

Fix this by getting a reference to the trigger before assigning it to the
IIO device.

Fixes: ae6d9ce05691 ("iio: mma8452: Add support for interrupt driven triggers.")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211024092700.6844-1-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:20 +01:00
Lars-Peter Clausen
00d3c14338 iio: stk3310: Don't return error code in interrupt handler
commit 8e1eeca5afa7ba84d885987165dbdc5decf15413 upstream.

Interrupt handlers must return one of the irqreturn_t values. Returning a
error code is not supported.

The stk3310 event interrupt handler returns an error code when reading the
flags register fails.

Fix the implementation to always return an irqreturn_t value.

Fixes: 3dd477acbdd1 ("iio: light: Add threshold interrupt support for STK3310")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211024171251.22896-3-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:20 +01:00
Alyssa Ross
111d5b61fb iio: trigger: stm32-timer: fix MODULE_ALIAS
commit 893621e0606747c5bbefcaf2794d12c7aa6212b7 upstream.

modprobe can't handle spaces in aliases.

Fixes: 93fbe91b5521 ("iio: Add STM32 timer trigger driver")
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Link: https://lore.kernel.org/r/20211125182850.2645424-1-hi@alyssa.is
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:20 +01:00
Lars-Peter Clausen
2db8ad169c iio: trigger: Fix reference counting
commit a827a4984664308f13599a0b26c77018176d0c7c upstream.

In viio_trigger_alloc() device_initialize() is used to set the initial
reference count of the trigger to 1. Then another get_device() is called on
trigger. This sets the reference count to 2 before the trigger is returned.

iio_trigger_free(), which is the matching API to viio_trigger_alloc(),
calls put_device() which decreases the reference count by 1. But the second
reference count acquired in viio_trigger_alloc() is never dropped.

As a result the iio_trigger_release() function is never called and the
memory associated with the trigger is never freed.

Since there is no reason for the trigger to start its lifetime with two
reference counts just remove the extra get_device() in
viio_trigger_alloc().

Fixes: 5f9c035cae18 ("staging:iio:triggers. Add a reference get to the core for triggers.")
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20211024092700.6844-2-lars@metafoo.de
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:20 +01:00
Kister Genesis Jimenez
7d2a35d997 iio: gyro: adxrs290: fix data signedness
commit fde272e78e004a45c7e4976876277d7e6a5a0ede upstream.

Properly sign-extend the rate and temperature data.

Fixes: 2c8920fff1457 ("iio: gyro: Add driver support for ADXRS290")
Signed-off-by: Kister Genesis Jimenez <kister.jimenez@analog.com>
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20211115104147.18669-1-nuno.sa@analog.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:20 +01:00
Mathias Nyman
02d5a2a48b xhci: avoid race between disable slot command and host runtime suspend
commit 7faac1953ed1f658f719cdf7bb7303fa5eef822c upstream.

Make xhci_disable_slot() synchronous, thus ensuring it, and
xhci_free_dev() calling it return after xHC controller completes
the disable slot command.

Otherwise the roothub and xHC host may runtime suspend, and clear the
command ring while the disable slot command is being processed.

This causes a command completion mismatch as the completion event can't
be mapped to the correct command.
Command ring gets out of sync and commands time out.
Driver finally assumes host is unresponsive and bails out.

usb 2-4: USB disconnect, device number 10
xhci_hcd 0000:00:0d.0: ERROR mismatched command completion event
...
xhci_hcd 0000:00:0d.0: xHCI host controller not responding, assume dead
xhci_hcd 0000:00:0d.0: HC died; cleaning up

Cc: <stable@vger.kernel.org>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20211210141735.1384209-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:20 +01:00
Pavel Hofman
d861bc26fe usb: core: config: using bit mask instead of individual bits
commit ca5737396927afd4d57b133fd2874bbcf3421cdb upstream.

Using standard USB_EP_MAXP_MULT_MASK instead of individual bits for
extracting multiple-transactions bits from wMaxPacketSize value.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211210085219.16796-2-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:20 +01:00
Kai-Heng Feng
47c14aceb2 xhci: Remove CONFIG_USB_DEFAULT_PERSIST to prevent xHCI from runtime suspending
commit 811ae81320da53a5670c36970cefacca8519f90e upstream.

When the xHCI is quirked with XHCI_RESET_ON_RESUME, runtime resume
routine also resets the controller.

This is bad for USB drivers without reset_resume callback, because
there's no subsequent call of usb_dev_complete() ->
usb_resume_complete() to force rebinding the driver to the device. For
instance, btusb device stops working after xHCI controller is runtime
resumed, if the controlled is quirked with XHCI_RESET_ON_RESUME.

So always take XHCI_RESET_ON_RESUME into account to solve the issue.

Cc: <stable@vger.kernel.org>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20211210141735.1384209-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:20 +01:00
Pavel Hofman
0141f85b78 usb: core: config: fix validation of wMaxPacketValue entries
commit 1a3910c80966e4a76b25ce812f6bea0ef1b1d530 upstream.

The checks performed by commit aed9d65ac327 ("USB: validate
wMaxPacketValue entries in endpoint descriptors") require that initial
value of the maxp variable contains both maximum packet size bits
(10..0) and multiple-transactions bits (12..11). However, the existing
code assings only the maximum packet size bits. This patch assigns all
bits of wMaxPacketSize to the variable.

Fixes: aed9d65ac327 ("USB: validate wMaxPacketValue entries in endpoint descriptors")
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211210085219.16796-1-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:20 +01:00
Douglas Anderson
f5230fb9bf Revert "usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default"
commit 6a97cee39d8f2ed4d6e35a09a302dae1d566db36 upstream.

This reverts commit cefdd52fa0455c0555c30927386ee466a108b060.

On sc7180-trogdor class devices with 'fw_devlink=permissive' and KASAN
enabled, you'll see a Use-After-Free reported at bootup.

The root of the problem is that dwc3_qcom_of_register_core() is adding
a devm-allocated "tx-fifo-resize" property to its device tree node
using of_add_property().

The issue is that of_add_property() makes a _permanent_ addition to
the device tree that lasts until reboot. That means allocating memory
for the property using "devm" managed memory is a terrible idea since
that memory will be freed upon probe deferral or device unbinding.

Let's revert the patch since the system is still functional without
it. The fact that of_add_property() makes a permanent change is extra
fodder for those folks who were aruging that the device tree isn't
really the right way to pass information between parts of the
driver. It is an exercise left to the reader to submit a patch
re-adding the new feature in a way that makes everyone happier.

Fixes: cefdd52fa045 ("usb: dwc3: dwc3-qcom: Enable tx-fifo-resize property by default")
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20211207094327.1.Ie3cde3443039342e2963262a4c3ac36dc2c08b30@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:19 +01:00
Greg Kroah-Hartman
6eea4ace62 USB: gadget: zero allocate endpoint 0 buffers
commit 86ebbc11bb3f60908a51f3e41a17e3f477c2eaa3 upstream.

Under some conditions, USB gadget devices can show allocated buffer
contents to a host.  Fix this up by zero-allocating them so that any
extra data will all just be zeros.

Reported-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Tested-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:19 +01:00
Greg Kroah-Hartman
36dfdf11af USB: gadget: detect too-big endpoint 0 requests
commit 153a2d7e3350cc89d406ba2d35be8793a64c2038 upstream.

Sometimes USB hosts can ask for buffers that are too large from endpoint
0, which should not be allowed.  If this happens for OUT requests, stall
the endpoint, but for IN requests, trim the request size to the endpoint
buffer size.

Co-developed-by: Szymon Heidrich <szymon.heidrich@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:19 +01:00
Peilin Ye
ef472b023b selftests/fib_tests: Rework fib_rp_filter_test()
commit f6071e5e3961eeb5300bd0901c9e128598730ae3 upstream.

Currently rp_filter tests in fib_tests.sh:fib_rp_filter_test() are
failing.  ping sockets are bound to dummy1 using the "-I" option
(SO_BINDTODEVICE), but socket lookup is failing when receiving ping
replies, since the routing table thinks they belong to dummy0.

For example, suppose ping is using a SOCK_RAW socket for ICMP messages.
When receiving ping replies, in __raw_v4_lookup(), sk->sk_bound_dev_if
is 3 (dummy1), but dif (skb_rtable(skb)->rt_iif) says 2 (dummy0), so the
raw_sk_bound_dev_eq() check fails.  Similar things happen in
ping_lookup() for SOCK_DGRAM sockets.

These tests used to pass due to a bug [1] in iputils, where "ping -I"
actually did not bind ICMP message sockets to device.  The bug has been
fixed by iputils commit f455fee41c07 ("ping: also bind the ICMP socket
to the specific device") in 2016, which is why our rp_filter tests
started to fail.  See [2] .

Fixing the tests while keeping everything in one netns turns out to be
nontrivial.  Rework the tests and build the following topology:

 ┌─────────────────────────────┐    ┌─────────────────────────────┐
 │  network namespace 1 (ns1)  │    │  network namespace 2 (ns2)  │
 │                             │    │                             │
 │  ┌────┐     ┌─────┐         │    │  ┌─────┐            ┌────┐  │
 │  │ lo │<───>│veth1│<────────┼────┼─>│veth2│<──────────>│ lo │  │
 │  └────┘     ├─────┴──────┐  │    │  ├─────┴──────┐     └────┘  │
 │             │192.0.2.1/24│  │    │  │192.0.2.1/24│             │
 │             └────────────┘  │    │  └────────────┘             │
 └─────────────────────────────┘    └─────────────────────────────┘

Consider sending an ICMP_ECHO packet A in ns2.  Both source and
destination IP addresses are 192.0.2.1, and we use strict mode rp_filter
in both ns1 and ns2:

  1. A is routed to lo since its destination IP address is one of ns2's
     local addresses (veth2);
  2. A is redirected from lo's egress to veth2's egress using mirred;
  3. A arrives at veth1's ingress in ns1;
  4. A is redirected from veth1's ingress to lo's ingress, again, using
     mirred;
  5. In __fib_validate_source(), fib_info_nh_uses_dev() returns false,
     since A was received on lo, but reverse path lookup says veth1;
  6. However A is not dropped since we have relaxed this check for lo in
     commit 66f8209547cc ("fib: relax source validation check for loopback
     packets");

Making sure A is not dropped here in this corner case is the whole point
of having this test.

  7. As A reaches the ICMP layer, an ICMP_ECHOREPLY packet, B, is
     generated;
  8. Similarly, B is redirected from lo's egress to veth1's egress (in
     ns1), then redirected once again from veth2's ingress to lo's
     ingress (in ns2), using mirred.

Also test "ping 127.0.0.1" from ns2.  It does not trigger the relaxed
check in __fib_validate_source(), but just to make sure the topology
works with loopback addresses.

Tested with ping from iputils 20210722-41-gf9fb573:

$ ./fib_tests.sh -t rp_filter

IPv4 rp_filter tests
    TEST: rp_filter passes local packets		[ OK ]
    TEST: rp_filter passes loopback packets		[ OK ]

[1] https://github.com/iputils/iputils/issues/55
[2] f455fee41c

Reported-by: Hangbin Liu <liuhangbin@gmail.com>
Fixes: adb701d6cfa4 ("selftests: add a test case for rp_filter")
Reviewed-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
Acked-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20211201004720.6357-1-yepeilin.cs@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:19 +01:00
Dan Carpenter
a72723e89f net/qla3xxx: fix an error code in ql_adapter_up()
commit d17b9737c2bc09b4ac6caf469826e5a7ce3ffab7 upstream.

The ql_wait_for_drvr_lock() fails and returns false, then this
function should return an error code instead of returning success.

The other problem is that the success path prints an error message
netdev_err(ndev, "Releasing driver lock\n");  Delete that and
re-order the code a little to make it more clear.

Fixes: 5a4faa873782 ("[PATCH] qla3xxx NIC driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20211207082416.GA16110@kili
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:19 +01:00
Eric Dumazet
0c9f1ab29e net, neigh: clear whole pneigh_entry at alloc time
commit e195e9b5dee6459d8c8e6a314cc71a644a0537fd upstream.

Commit 2c611ad97a82 ("net, neigh: Extend neigh->flags to 32 bit
to allow for extensions") enables a new KMSAM warning [1]

I think the bug is actually older, because the following intruction
only occurred if ndm->ndm_flags had NTF_PROXY set.

	pn->flags = ndm->ndm_flags;

Let's clear all pneigh_entry fields at alloc time.

[1]
BUG: KMSAN: uninit-value in pneigh_fill_info+0x986/0xb30 net/core/neighbour.c:2593
 pneigh_fill_info+0x986/0xb30 net/core/neighbour.c:2593
 pneigh_dump_table net/core/neighbour.c:2715 [inline]
 neigh_dump_info+0x1e3f/0x2c60 net/core/neighbour.c:2832
 netlink_dump+0xaca/0x16a0 net/netlink/af_netlink.c:2265
 __netlink_dump_start+0xd1c/0xee0 net/netlink/af_netlink.c:2370
 netlink_dump_start include/linux/netlink.h:254 [inline]
 rtnetlink_rcv_msg+0x181b/0x18c0 net/core/rtnetlink.c:5534
 netlink_rcv_skb+0x447/0x800 net/netlink/af_netlink.c:2491
 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5589
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x1095/0x1360 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x16f3/0x1870 net/netlink/af_netlink.c:1916
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg net/socket.c:724 [inline]
 sock_write_iter+0x594/0x690 net/socket.c:1057
 call_write_iter include/linux/fs.h:2162 [inline]
 new_sync_write fs/read_write.c:503 [inline]
 vfs_write+0x1318/0x2030 fs/read_write.c:590
 ksys_write+0x28c/0x520 fs/read_write.c:643
 __do_sys_write fs/read_write.c:655 [inline]
 __se_sys_write fs/read_write.c:652 [inline]
 __x64_sys_write+0xdb/0x120 fs/read_write.c:652
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 slab_post_alloc_hook mm/slab.h:524 [inline]
 slab_alloc_node mm/slub.c:3251 [inline]
 slab_alloc mm/slub.c:3259 [inline]
 __kmalloc+0xc3c/0x12d0 mm/slub.c:4437
 kmalloc include/linux/slab.h:595 [inline]
 pneigh_lookup+0x60f/0xd70 net/core/neighbour.c:766
 arp_req_set_public net/ipv4/arp.c:1016 [inline]
 arp_req_set+0x430/0x10a0 net/ipv4/arp.c:1032
 arp_ioctl+0x8d4/0xb60 net/ipv4/arp.c:1232
 inet_ioctl+0x4ef/0x820 net/ipv4/af_inet.c:947
 sock_do_ioctl net/socket.c:1118 [inline]
 sock_ioctl+0xa3f/0x13e0 net/socket.c:1235
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0x2df/0x4a0 fs/ioctl.c:860
 __x64_sys_ioctl+0xd8/0x110 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x44/0xae

CPU: 1 PID: 20001 Comm: syz-executor.0 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

Fixes: 62dd93181aaa ("[IPV6] NDISC: Set per-entry is_router flag in Proxy NA.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Roopa Prabhu <roopa@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20211206165329.1049835-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:19 +01:00
Joakim Zhang
48135149c0 net: fec: only clear interrupt of handling queue in fec_enet_rx_queue()
commit b5bd95d17102b6719e3531d627875b9690371383 upstream.

Background:
We have a customer is running a Profinet stack on the 8MM which receives and
responds PNIO packets every 4ms and PNIO-CM packets every 40ms. However, from
time to time the received PNIO-CM package is "stock" and is only handled when
receiving a new PNIO-CM or DCERPC-Ping packet (tcpdump shows the PNIO-CM and
the DCERPC-Ping packet at the same time but the PNIO-CM HW timestamp is from
the expected 40 ms and not the 2s delay of the DCERPC-Ping).

After debugging, we noticed PNIO, PNIO-CM and DCERPC-Ping packets would
be handled by different RX queues.

The root cause should be driver ack all queues' interrupt when handle a
specific queue in fec_enet_rx_queue(). The blamed patch is introduced to
receive as much packets as possible once to avoid interrupt flooding.
But it's unreasonable to clear other queues'interrupt when handling one
queue, this patch tries to fix it.

Fixes: ed63f1dcd578 (net: fec: clear receive interrupts before processing a packet)
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Reported-by: Nicolas Diaz <nicolas.diaz@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Link: https://lore.kernel.org/r/20211206135457.15946-1-qiangqing.zhang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:19 +01:00
Dan Carpenter
089bd0b0bf net: altera: set a couple error code in probe()
commit badd7857f5c933a3dc34942a2c11d67fdbdc24de upstream.

There are two error paths which accidentally return success instead of
a negative error code.

Fixes: bbd2190ce96d ("Altera TSE: Add main and header file for Altera Ethernet Driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:19 +01:00
Lee Jones
37493d4eb2 net: cdc_ncm: Allow for dwNtbOutMaxSize to be unset or zero
commit 2be6d4d16a0849455a5c22490e3c5983495fed00 upstream.

Currently, due to the sequential use of min_t() and clamp_t() macros,
in cdc_ncm_check_tx_max(), if dwNtbOutMaxSize is not set, the logic
sets tx_max to 0.  This is then used to allocate the data area of the
SKB requested later in cdc_ncm_fill_tx_frame().

This does not cause an issue presently because when memory is
allocated during initialisation phase of SKB creation, more memory
(512b) is allocated than is required for the SKB headers alone (320b),
leaving some space (512b - 320b = 192b) for CDC data (172b).

However, if more elements (for example 3 x u64 = [24b]) were added to
one of the SKB header structs, say 'struct skb_shared_info',
increasing its original size (320b [320b aligned]) to something larger
(344b [384b aligned]), then suddenly the CDC data (172b) no longer
fits in the spare SKB data area (512b - 384b = 128b).

Consequently the SKB bounds checking semantics fails and panics:

  skbuff: skb_over_panic: text:ffffffff830a5b5f len:184 put:172   \
     head:ffff888119227c00 data:ffff888119227c00 tail:0xb8 end:0x80 dev:<NULL>

  ------------[ cut here ]------------
  kernel BUG at net/core/skbuff.c:110!
  RIP: 0010:skb_panic+0x14f/0x160 net/core/skbuff.c:106
  <snip>
  Call Trace:
   <IRQ>
   skb_over_panic+0x2c/0x30 net/core/skbuff.c:115
   skb_put+0x205/0x210 net/core/skbuff.c:1877
   skb_put_zero include/linux/skbuff.h:2270 [inline]
   cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1116 [inline]
   cdc_ncm_fill_tx_frame+0x127f/0x3d50 drivers/net/usb/cdc_ncm.c:1293
   cdc_ncm_tx_fixup+0x98/0xf0 drivers/net/usb/cdc_ncm.c:1514

By overriding the max value with the default CDC_NCM_NTB_MAX_SIZE_TX
when not offered through the system provided params, we ensure enough
data space is allocated to handle the CDC data, meaning no crash will
occur.

Cc: Oliver Neukum <oliver@neukum.org>
Fixes: 289507d3364f9 ("net: cdc_ncm: use sysfs for rx/tx aggregation tuning")
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Bjørn Mork <bjorn@mork.no>
Link: https://lore.kernel.org/r/20211202143437.1411410-1-lee.jones@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:19 +01:00
Arnaldo Carvalho de Melo
8ca1ca4097 tools build: Remove needless libpython-version feature check that breaks test-all fast path
commit 3d1d57debee2d342a47615707588b96658fabb85 upstream.

Since 66dfdff03d196e51 ("perf tools: Add Python 3 support") we don't use
the tools/build/feature/test-libpython-version.c version in any Makefile
feature check:

  $ find tools/ -type f | xargs grep feature-libpython-version
  $

The only place where this was used was removed in 66dfdff03d196e51:

  -        ifneq ($(feature-libpython-version), 1)
  -          $(warning Python 3 is not yet supported; please set)
  -          $(warning PYTHON and/or PYTHON_CONFIG appropriately.)
  -          $(warning If you also have Python 2 installed, then)
  -          $(warning try something like:)
  -          $(warning $(and ,))
  -          $(warning $(and ,)  make PYTHON=python2)
  -          $(warning $(and ,))
  -          $(warning Otherwise, disable Python support entirely:)
  -          $(warning $(and ,))
  -          $(warning $(and ,)  make NO_LIBPYTHON=1)
  -          $(warning $(and ,))
  -          $(error   $(and ,))
  -        else
  -          LDFLAGS += $(PYTHON_EMBED_LDFLAGS)
  -          EXTLIBS += $(PYTHON_EMBED_LIBADD)
  -          LANG_BINDINGS += $(obj-perf)python/perf.so
  -          $(call detected,CONFIG_LIBPYTHON)
  -        endif

And nowadays we either build with PYTHON=python3 or just install the
python3 devel packages and perf will build against it.

But the leftover feature-libpython-version check made the fast path
feature detection to break in all cases except when python2 devel files
were installed:

  $ rpm -qa | grep python.*devel
  python3-devel-3.9.7-1.fc34.x86_64
  $ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ;
  $ make -C tools/perf O=/tmp/build/perf install-bin
  make: Entering directory '/var/home/acme/git/perf/tools/perf'
    BUILD:   Doing 'make -j32' parallel build
    HOSTCC  /tmp/build/perf/fixdep.o
  <SNIP>
  $ cat /tmp/build/perf/feature/test-all.make.output
  In file included from test-all.c:18:
  test-libpython-version.c:5:10: error: #error
      5 |         #error
        |          ^~~~~
  $ ldd ~/bin/perf | grep python
	libpython3.9.so.1.0 => /lib64/libpython3.9.so.1.0 (0x00007fda6dbcf000)
  $

As python3 is the norm these days, fix this by just removing the unused
feature-libpython-version feature check, making the test-all fast path
to work with the common case.

With this:

  $ rm -rf /tmp/build/perf ; mkdir -p /tmp/build/perf ;
  $ make -C tools/perf O=/tmp/build/perf install-bin |& head
  make: Entering directory '/var/home/acme/git/perf/tools/perf'
    BUILD:   Doing 'make -j32' parallel build
    HOSTCC  /tmp/build/perf/fixdep.o
    HOSTLD  /tmp/build/perf/fixdep-in.o
    LINK    /tmp/build/perf/fixdep

  Auto-detecting system features:
  ...                         dwarf: [ on  ]
  ...            dwarf_getlocations: [ on  ]
  ...                         glibc: [ on  ]
  $ ldd ~/bin/perf | grep python
	libpython3.9.so.1.0 => /lib64/libpython3.9.so.1.0 (0x00007f58800b0000)
  $ cat /tmp/build/perf/feature/test-all.make.output
  $

Reviewed-by: James Clark <james.clark@arm.com>
Fixes: 66dfdff03d196e51 ("perf tools: Add Python 3 support")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jaroslav Škarvada <jskarvad@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/YaYmeeC6CS2b8OSz@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
Alexander Stein
9c2407afbc dt-bindings: net: Reintroduce PHY no lane swap binding
commit 96db48c9d777a73a33b1d516c5cfed7a417a5f40 upstream.

This binding was already documented in phy.txt, commit 252ae5330daa
("Documentation: devicetree: Add PHY no lane swap binding"), but got
accidently removed during YAML conversion in commit d8704342c109
("dt-bindings: net: Add a YAML schemas for the generic PHY options").

Note: 'enet-phy-lane-no-swap' and the absence of 'enet-phy-lane-swap' are
not identical, as the former one disable this feature, while the latter
one doesn't change anything.

Fixes: d8704342c109 ("dt-bindings: net: Add a YAML schemas for the generic PHY options")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20211130082756.713919-1-alexander.stein@ew.tq-group.com
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
Sebastian Andrzej Siewior
2e837d90ec Documentation/locking/locktypes: Update migrate_disable() bits.
commit 6a631c0432dcccbcf45839016a07c015e335e9ae upstream.

The initial implementation of migrate_disable() for mainline was a
wrapper around preempt_disable(). RT kernels substituted this with
a real migrate disable implementation.

Later on mainline gained true migrate disable support, but the
documentation was not updated.

Update the documentation, remove the claims about migrate_disable()
mapping to preempt_disable() on non-PREEMPT_RT kernels.

Fixes: 74d862b682f51 ("sched: Make migrate_disable/enable() independent of RT")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211127163200.10466-2-bigeasy@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
Ian Rogers
395022a71b perf tools: Fix SMT detection fast read path
commit 4ffbe87e2d5b53bcb0213d8650bbe70bf942de6a upstream.

sysfs__read_int() returns 0 on success, and so the fast read path was
always failing.

Fixes: bb629484d924118e ("perf tools: Simplify checking if SMT is active.")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20211124001231.3277836-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
Nicholas Kazlauskas
f1131d3f1b drm/amd/display: Fix DPIA outbox timeout after S3/S4/reset
commit af6902ec415655236adea91826bd96ed0ab16f42 upstream.

[Why]
The HW interrupt gets disabled after S3/S4/reset so we don't receive
notifications for HPD or AUX from DMUB - leading to timeout and
black screen with (or without) DPIA links connected.

[How]
Re-enable the interrupt after S3/S4/reset like we do for the other
DC interrupts.

Guard both instances of the outbox interrupt enable or we'll hang
during restore on ASIC that don't support it.

Fixes: 6eff272dbee7ad ("drm/amd/display: Fix DPIA outbox timeout after GPU reset")

Reviewed-by: Jude Shih <Jude.Shih@amd.com>
Acked-by: Pavle Kotarac <Pavle.Kotarac@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
Marek Behún
99bc198983 Revert "PCI: aardvark: Fix support for PCI_ROM_ADDRESS1 on emulated bridge"
commit 39bd54d43b3f8b3c7b3a75f5d868d8bb858860e7 upstream.

This reverts commit 239edf686c14a9ff926dec2f350289ed7adfefe2.

239edf686c14 ("PCI: aardvark: Fix support for PCI_ROM_ADDRESS1 on emulated
bridge") added support for the Type 1 Expansion ROM BAR at config offset
0x38, based on the register being listed in the Marvell Armada A3720 spec.
But the spec doesn't document it at all for RC mode, and there is no ROM in
the SOC, so remove this emulation for now.

The PCI bridge which represents aardvark's PCIe Root Port has an Expansion
ROM Base Address register at offset 0x30, but its meaning is different than
PCI's Expansion ROM BAR register, although the layout is the same.  (This
is why we thought it does the same thing.)

First: there is no ROM (or part of BootROM) in the A3720 SOC dedicated for
PCIe Root Port (or controller in RC mode) containing executable code that
would initialize the Root Port, suitable for execution in bootloader (this
is how Expansion ROM BAR is used on x86).

Second: in A3720 spec the register (address 0xD0070030) is not documented
at all for Root Complex mode, but similar to other BAR registers, it has an
"entangled partner" in register 0xD0075920, which does address translation
for the BAR in 0xD0070030:

  - the BAR register sets the address from the view of PCIe bus

  - the translation register sets the address from the view of the CPU

The other BAR registers also have this entangled partner, and they can be
used to:

  - in RC mode: address-checking on the receive side of the RC (they can
    define address ranges for memory accesses from remote Endpoints to the
    RC)

  - in Endpoint mode: allow the remote CPU to access memory on A3720

The Expansion ROM BAR has only the Endpoint part documented, but from the
similarities we think that it can also be used in RC mode in that way.

So either Expansion ROM BAR has different meaning (if the hypothesis above
is true), or we don't know it's meaning (since it is not documented for RC
mode).

Remove the register from the emulated bridge accessing functions.

[bhelgaas: summarize reason for removal (first paragraph)]
Fixes: 239edf686c14 ("PCI: aardvark: Fix support for PCI_ROM_ADDRESS1 on emulated bridge")
Link: https://lore.kernel.org/r/20211125160148.26029-3-kabel@kernel.org
Signed-off-by: Marek Behún <kabel@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
Norbert Zulinski
16431e442d i40e: Fix NULL pointer dereference in i40e_dbg_dump_desc
commit 23ec111bf3549aae37140330c31a16abfc172421 upstream.

When trying to dump VFs VSI RX/TX descriptors
using debugfs there was a crash
due to NULL pointer dereference in i40e_dbg_dump_desc.
Added a check to i40e_dbg_dump_desc that checks if
VSI type is correct for dumping RX/TX descriptors.

Fixes: 02e9c290814c ("i40e: debugfs interface")
Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Norbert Zulinski <norbertx.zulinski@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
John Fastabend
f8358589b3 bpf, sockmap: Re-evaluate proto ops when psock is removed from sockmap
commit c0d95d3380ee099d735e08618c0d599e72f6c8b0 upstream.

When a sock is added to a sock map we evaluate what proto op hooks need to
be used. However, when the program is removed from the sock map we have not
been evaluating if that changes the required program layout.

Before the patch listed in the 'fixes' tag this was not causing failures
because the base program set handles all cases. Specifically, the case with
a stream parser and the case with out a stream parser are both handled. With
the fix below we identified a race when running with a proto op that attempts
to read skbs off both the stream parser and the skb->receive_queue. Namely,
that a race existed where when the stream parser is empty checking the
skb->receive_queue from recvmsg at the precies moment when the parser is
paused and the receive_queue is not empty could result in skipping the stream
parser. This may break a RX policy depending on the parser to run.

The fix tag then loads a specific proto ops that resolved this race. But, we
missed removing that proto ops recv hook when the sock is removed from the
sockmap. The result is the stream parser is stopped so no more skbs will be
aggregated there, but the hook and BPF program continues to be attached on
the psock. User space will then get an EBUSY when trying to read the socket
because the recvmsg() handler is now waiting on a stopped stream parser.

To fix we rerun the proto ops init() function which will look at the new set
of progs attached to the psock and rest the proto ops hook to the correct
handlers. And in the above case where we remove the sock from the sock map
the RX prog will no longer be listed so the proto ops is removed.

Fixes: c5d2177a72a16 ("bpf, sockmap: Fix race in ingress receive verdict with redirect to self")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20211119181418.353932-3-john.fastabend@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
Herve Codina
a4953e7b6f mtd: rawnand: fsmc: Fix timing computation
commit 9472335eaa1452b51dc8e8edaa1a342997cb80c7 upstream.

Under certain circumstances, the timing settings calculated by
the FSMC NAND controller driver were inaccurate.
These settings led to incorrect data reads or fallback to
timing mode 0 depending on the NAND chip used.

The timing computation did not take into account the following
constraint given in SPEAr3xx reference manual:
  twait >= tCEA - (tset * TCLK) + TOUTDEL + TINDEL

Enhance the timings calculation by taking into account this
additional constraint.

This change has no impact on slow timing modes such as mode 0.
Indeed, on mode 0, computed values are the same with and
without the patch.

NANDs which previously stayed in mode 0 because of fallback to
mode 0 can now work at higher speeds and NANDs which were not
working at all because of the corrupted data work at high
speeds without troubles.

Overall improvement on a Micron/MT29F1G08 (flash_speed tool):
                        mode0       mode3
eraseblock write speed  3220 KiB/s  4511 KiB/s
eraseblock read speed   4491 KiB/s  7529 KiB/s

Fixes: d9fb079571833 ("mtd: nand: fsmc: add support for SDR timings")
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211119150316.43080-5-herve.codina@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
Herve Codina
ebc8909fee mtd: rawnand: fsmc: Take instruction delay into account
commit a4ca0c439f2d5ce9a3dc118d882f9f03449864c8 upstream.

The FSMC NAND controller should apply a delay after the
instruction has been issued on the bus.
The FSMC NAND controller driver did not handle this delay.

Add this waiting delay in the FSMC NAND controller driver.

Fixes: 4da712e70294 ("mtd: nand: fsmc: use ->exec_op()")
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20211119150316.43080-4-herve.codina@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:18 +01:00
Mateusz Palczewski
fabfb7c18c i40e: Fix pre-set max number of queues for VF
commit 8aa55ab422d9d0d825ebfb877702ed661e96e682 upstream.

After setting pre-set combined to 16 queues and reserving 16 queues by
tc qdisc, pre-set maximum combined queues returned to default value
after VF reset being 4 and this generated errors during removing tc.
Fixed by removing clear num_req_queues before reset VF.

Fixes: e284fc280473 (i40e: Add and delete cloud filter)
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Bindushree P <Bindushree.p@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:17 +01:00
Karen Sornek
2132643b95 i40e: Fix failed opcode appearing if handling messages from VF
commit 61125b8be85dfbc7e9c7fe1cc6c6d631ab603516 upstream.

Fix failed operation code appearing if handling messages from VF.
Implemented by waiting for VF appropriate state if request starts
handle while VF reset.
Without this patch the message handling request while VF is in
a reset state ends with error -5 (I40E_ERR_PARAM).

Fixes: 5c3c48ac6bf5 ("i40e: implement virtual device interface")
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@intel.com>
Signed-off-by: Karen Sornek <karen.sornek@intel.com>
Tested-by: Tony Brelinski <tony.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:17 +01:00
Bjorn Andersson
06ece58874 clk: qcom: clk-alpha-pll: Don't reconfigure running Trion
commit a1f0019c342bd83240b05be68c9888549dde7935 upstream.

In the event that the bootloader has configured the Trion PLL as source
for the display clocks, e.g. for the continuous splashscreen, then there
will also be RCGs that are clocked by this instance.

Reconfiguring, and in particular disabling the output of, the PLL will
cause issues for these downstream RCGs and has been shown to prevent
them from being re-parented.

Follow downstream and skip configuration if it's determined that the PLL
is already running.

Fixes: 59128c20a6a9 ("clk: qcom: clk-alpha-pll: Add support for controlling Lucid PLLs")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20211123162508.153711-1-bjorn.andersson@linaro.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-12-14 10:57:17 +01:00