Commit Graph

547555 Commits

Author SHA1 Message Date
Olof Johansson
fa54cda779 The i.MX SoC updates for 4.4:
- Enable suspend and cpufreq support for i.MX6UL
  - Add platform level ENET initialization support for i.MX7D
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Merge tag 'imx-soc-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into next/soc

The i.MX SoC updates for 4.4:
 - Enable suspend and cpufreq support for i.MX6UL
 - Add platform level ENET initialization support for i.MX7D

* tag 'imx-soc-4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: imx: add cpufreq device for imx6ul
  ARM: imx: add enet init for i.MX7D platform
  ARM: imx7d: add imx7d iomux-gpr field define
  ARM: imx: add suspend/resume support for i.mx6ul

Signed-off-by: Olof Johansson <olof@lixom.net>
2015-10-23 10:49:47 -07:00
Olof Johansson
00b24d4454 Do the initial setting of the pmic wrap interrupt before requesting the interrupt.
This fixes the corner-case where the pmic is initialized by the bootloader, but
 not the pmic watchdog.
 
 Add support for active wakeup to the scpsys. This allows to keep the power of
 a scpsys domain  during suspend state.
 
 With version v4.3 new subsystem clocks are added to the clock dirver. In late
 init the kernel turns off all unused clocks. This can provoke a hang if
 the kernel tries to access the venc and venc_lt power domain registers.
 Add the necessary parent clocks for this power domains to
 the scpsys so that no random hang happens.
 
 The bootloader of mt6589, mt8135 and mt1827 does not turn on the arm-arch-timer.
 As there is no opensource bootloader in the near future for this architectures
 we enable the arch timer at kernel boot. We need the arch timer for SMP boot.
 
 Add support for SMP on mt6589, mt8127 and mt8135.
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Merge tag 'v4.3-next-soc' of https://github.com/mbgg/linux-mediatek into next/soc

Do the initial setting of the pmic wrap interrupt before requesting the interrupt.
This fixes the corner-case where the pmic is initialized by the bootloader, but
not the pmic watchdog.

Add support for active wakeup to the scpsys. This allows to keep the power of
a scpsys domain  during suspend state.

With version v4.3 new subsystem clocks are added to the clock dirver. In late
init the kernel turns off all unused clocks. This can provoke a hang if
the kernel tries to access the venc and venc_lt power domain registers.
Add the necessary parent clocks for this power domains to
the scpsys so that no random hang happens.

The bootloader of mt6589, mt8135 and mt1827 does not turn on the arm-arch-timer.
As there is no opensource bootloader in the near future for this architectures
we enable the arch timer at kernel boot. We need the arch timer for SMP boot.

Add support for SMP on mt6589, mt8127 and mt8135.

* tag 'v4.3-next-soc' of https://github.com/mbgg/linux-mediatek:
  ARM: mediatek: add smp bringup code
  ARM: mediatek: enable gpt6 on boot up to make arch timer working
  soc: mediatek: Fix random hang up issue while kernel init
  soc: mediatek: add scpsys support active_wakeup
  soc: mediatek: Move the initial setting of pmic wrap interrupt before requesting irq.

Signed-off-by: Olof Johansson <olof@lixom.net>
2015-10-23 10:22:05 -07:00
Olof Johansson
fc1f61f1c0 Allwinner core changes for 4.4
Add support for the Allwinner R8 SoC used in the CHIP.
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Merge tag 'sunxi-core-for-4.4' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into next/soc

Allwinner core changes for 4.4

Add support for the Allwinner R8 SoC used in the CHIP.

* tag 'sunxi-core-for-4.4' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
  ARM: sunxi: Add R8 support

Signed-off-by: Olof Johansson <olof@lixom.net>
2015-10-23 10:19:36 -07:00
Maxime Ripard
bef6229f36 ARM: sunxi: Add R8 support
The R8 is a new Allwinner SoC based on the A13. While both are very
similar, there's still a few differences. Introduce a new compatible to
deal with them.

In order to have a consistent naming, instead of mentioning the Allwinner
A series as the machine name, switch to sun4i/sun5i like what is done for
the other families.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
2015-10-17 18:47:28 +02:00
Arnd Bergmann
5462b10af1 Marvell Berlin SoC for 4.4 take 2
- use the non-self-clearing reset register
 - add cpu hotplug support
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Merge tag 'berlin-soc-for-4.4-2' of git://git.infradead.org/users/hesselba/linux-berlin into next/soc

Merge "Marvell Berlin SoC for 4.4 take 2" from Sebastian Hesselbarth:

- use the non-self-clearing reset register
- add cpu hotplug support

* tag 'berlin-soc-for-4.4-2' of git://git.infradead.org/users/hesselba/linux-berlin:
  arm: berlin: add CPU hotplug support
  arm: berlin: use non-self-cleared reset register to reset cpu
2015-10-15 22:55:53 +02:00
Baruch Siach
8207e2edbd ARM: digicolor: select pinctrl/gpio driver
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-10-15 22:27:30 +02:00
Arnd Bergmann
cfd96d3e74 ARM Keystone SOC driver updates for 4.4
Documentation and support to be able to load the PDSP
 	firmware necessary for accumulator operation.
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Merge tag 'keystone-driver-soc_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/soc

Merge "ARM Keystone SOC driver updates for 4.4" from Santosh Shilimkar:

	Documentation and support to be able to load the PDSP
	firmware necessary for accumulator operation.

* tag 'keystone-driver-soc_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
  soc: ti: qmss: make acc queue support optional in the driver
  soc: ti: add firmware file name as part of the driver
  Documentation: dt: soc: Add description for knav qmss driver
2015-10-15 22:22:26 +02:00
Arnd Bergmann
d72b712824 Merge tag 'arm-soc/for-4.4/soc' of http://github.com/Broadcom/stblinux into next/soc
Merge "Broadcom soc changes for v4.4 (try 2)" from Florian Fainelli:

This pull request contains the following Broadcom SoC platform and driver changes:

- Brian Norris create a drivers/soc/brcmstb/ stub as a place holder for SoC-specific
  code which is coming next

- Florian Fainelli adds support for configuring the BCM7xxx SoCs Bus Interface Unit
  with their specific write-pairing setting, which must be saved and restored during
  system-wide suspend/resume, and consequently updates the brcmstb machine code to
  initialize the BIU

- Jon Mason adds support for the Northstar Plus SoCs by introducing a custom machine
  descriptor matching their compatible string and setting up the PL310 L2 cache and
  enabling the relevant ARM errata for their Cortex-A9

* tag 'arm-soc/for-4.4/soc' of http://github.com/Broadcom/stblinux:
  ARM: brcmstb: Setup BIU control registers during boot
  soc: brcmstb: Add Bus Interface Unit control setup
  soc: add stubs for brcmstb SoC's
  ARM: NSP: Add basic support for Broadcom Northstar Plus SoC
2015-10-15 22:09:07 +02:00
Arnd Bergmann
aebd774de9 Marvell SoC for 4.4 take 1
- register cpufreq-dt device
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Merge tag 'berlin-soc-for-4.4-1' of git://git.infradead.org/users/hesselba/linux-berlin into next/soc

Merge "Marvell SoC for 4.4 take 1" from Sebastian Hesselbarth:
- register cpufreq-dt device

* tag 'berlin-soc-for-4.4-1' of git://git.infradead.org/users/hesselba/linux-berlin:
  ARM: berlin: register cpufreq-dt
2015-10-15 22:06:45 +02:00
Arnd Bergmann
dc7a499674 Marvell Berlin ARM64 SoC for 4.4 take 1
- enable ARCH_REQUIRE_GPIOLIB for DW GPIO driver
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Merge tag 'berlin64-soc-for-4.4-1' of git://git.infradead.org/users/hesselba/linux-berlin into next/soc

Merge "Marvell Berlin ARM64 SoC for 4.4 take 1" from Sebastian Hesselbarth:
- enable ARCH_REQUIRE_GPIOLIB for DW GPIO driver

* tag 'berlin64-soc-for-4.4-1' of git://git.infradead.org/users/hesselba/linux-berlin:
  arm64: berlin: enable ARCH_REQUIRE_GPIOLIB
2015-10-15 22:04:18 +02:00
Arnd Bergmann
19f47051e5 mvebu soc for 4.4 (part 1)
L2 caches optimization for Armada XP
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Merge tag 'mvebu-soc-4.4-1' of git://git.infradead.org/linux-mvebu into next/soc

Merge "mvebu soc for 4.4 (part 1)" from Gregory CLEMENT:

L2 caches optimization for Armada XP

* tag 'mvebu-soc-4.4-1' of git://git.infradead.org/linux-mvebu:
  ARM: mvebu: add support to clear shared L2 bit on Armada XP
2015-10-15 22:03:35 +02:00
Jisheng Zhang
a7b3d5a715 arm: berlin: add CPU hotplug support
Add cpu hotplug support for berlin SoCs such as BG2 and BG2Q. These SoC
don't support power off cpu independently, but we also want cpu hotplug
support in these SoCs. We achieve this goal by putting the dying CPU in
WFI state after the coherency is disabled, then asserting the dying CPU
reset bit to put the CPU in reset state.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
2015-10-15 21:14:28 +02:00
Jisheng Zhang
ac7fc233b2 arm: berlin: use non-self-cleared reset register to reset cpu
In Berlin SoCs, there are two kinds of cpu reset control registers: the
first one's corresponding bits will be self-cleared after some cycles,
while the second one's bits won't. Previously the first kind of reset
control register is used, this patch uses the second kind one to prepare
for the next hotplug commit.

Signed-off-by: Jisheng Zhang <jszhang@marvell.com>
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
2015-10-15 21:10:22 +02:00
Yingjoe Chen
0cda07001a ARM: mediatek: add smp bringup code
Add support for booting secondary CPUs on mt6589, mt8127
and mt8135.

Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
2015-10-14 15:34:44 +02:00
Matthias Brugger
9821e545c5 ARM: mediatek: enable gpt6 on boot up to make arch timer working
We enable GTP6 which ungates the arch timer clock.
In the future this should be done in the bootloader.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
2015-10-14 15:34:44 +02:00
James Liao
41b3e0f067 soc: mediatek: Fix random hang up issue while kernel init
In kernel late init, it turns off all unused clocks, which
needs to access subsystem registers such as VENC and VENC_LT.

Accessing MT8173 VENC registers needs two top clocks, mm_sel and
venc_sel. Accessing VENC_LT registers needs mm_sel and venclt_sel.
So we need to keep these clocks on before accessing their registers.

This patch keeps venc_sel / venclt_sel clock on when
VENC / VENC_LT's power is on, to prevent system hang up while
accessing its registeres.

Signed-off-by: James Liao <jamesjj.liao@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
2015-10-14 15:34:43 +02:00
Murali Karicheri
045016902b soc: ti: qmss: make acc queue support optional in the driver
acc channels are available only if accumulator PDSP is loaded and
running in the SoC. As this requires firmware and user may not have
firmware in the file system, make the accumulator queue support
available in qmss driver optional. To use accumulator queus user needs
to add firmware to the file system and boot up kernel.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
2015-10-13 13:49:04 -07:00
Murali Karicheri
96ee19becc soc: ti: add firmware file name as part of the driver
Currently firmware file name is included in the DTS. This is not scalable
as user has to change the DTS if they need upgrade to a new firmware.
Instead, add the firmware file name in the driver itself. As long as there
is no API change, new firmware upgrade is easy and require no driver
change. User is expected to copy the firmware image to the file system
and add a sym link to the new firmware for doing an upgrade. Driver add
a array of firmware file names to search for the available firmware blobs.
This scheme also prepare the driver for future changes to API if ever
happens. In such case it is assumed that driver needs to change to
accommodate the new firmware and new firmware file name will get added to
the array.

Also update the DT document to remove the firmware attribute and add
description about firmware in the driver documentation.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
2015-10-13 13:49:04 -07:00
Murali Karicheri
29204a8272 Documentation: dt: soc: Add description for knav qmss driver
Add documentation for knav qmss driver.

Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
2015-10-13 13:49:04 -07:00
Bai Ping
7f7308198f ARM: imx: add cpufreq device for imx6ul
Add cpufreq device for i.MX6UL. Using the common
cpufreq of i.MX6 SOC.

Signed-off-by: Bai Ping <b51503@freescale.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2015-10-12 21:47:22 +08:00
Florian Fainelli
c4a8ea9e06 ARM: brcmstb: Setup BIU control registers during boot
Call brcmstb_biuctrl_init() in brcmstb's init_irq machine descriptor
callback since we need to setup the Bus Interface Unit before SMP in
particular, but we also need to be able to remap registers.

Acked-by: Gregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-10-09 13:42:18 -07:00
Florian Fainelli
9a764234ee soc: brcmstb: Add Bus Interface Unit control setup
Broadcom STB SoCs (brcmstb) require an early setup of their Bus
Interface Unit control register, this needs to happen before SMP is
brought up because it affects how the CPU complex will be interfaced to
the memory controller.

Add support code which properly initializes the BIU registers based on
whether "brcm,write-pairing" is present in Device Tree, and take care of
saving and restoring credit register settings during system-wide
suspend/resume operations.

Acked-by: Gregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-10-09 13:42:16 -07:00
Carlo Caione
55fa3ee081 ARM: meson: Enable Meson8b SoCs
Signed-off-by: Carlo Caione <carlo@endlessm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-10-08 17:22:11 +02:00
Arnd Bergmann
d64c5097ff First little batch of SoC changes for 4.4:
- a MAINTAINER addition to cover SAMA5 SoCs
 - removal of one unneeded header file
 - for low-level serial output, use the DEBUG_UART_PHYS
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Merge tag 'at91-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91 into next/soc

Merge "First little batch of SoC changes for 4.4" from Nicolas Ferre:

- a MAINTAINER addition to cover SAMA5 SoCs
- removal of one unneeded header file
- for low-level serial output, use the DEBUG_UART_PHYS

* tag 'at91-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91:
  ARM: at91: debug: use DEBUG_UART_PHYS
  ARM: at91: remove useless includes in platform_data/atmel.h
  MAINTAINERS: explicitly add Atmel SAMA5
2015-10-06 16:43:25 +02:00
Arnd Bergmann
6468527318 Renesas ARM Based SoC Updates for v4.4
* ARM: shmobile: R-Mobile: Use CPG/MSTP Clock Domain attach/detach helpers
 
   This part of a multi-stage effort by Geert Uytterhoeven to add:
 
   "Clock Domain support to the Clock Pulse Generator (CPG) Module Stop
    (MSTP) Clocks driver using the generic PM Domain, to be used on shmobile
    SoCs without device power domains (R-Car Gen1 and Gen2, RZ).  This allows
    to power-manage the module clocks of SoC devices that are part of the
    CPG/MSTP Clock Domain using Runtime PM, or for system suspend/resume,
    similar to SoCs with device power domains (SH-Mobile and R-Mobile)."
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Merge tag 'renesas-soc-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas into next/soc

Merge "Renesas ARM Based SoC Updates for v4.4" from Simon Horman:

* ARM: shmobile: R-Mobile: Use CPG/MSTP Clock Domain attach/detach helpers

  This part of a multi-stage effort by Geert Uytterhoeven to add:

  "Clock Domain support to the Clock Pulse Generator (CPG) Module Stop
   (MSTP) Clocks driver using the generic PM Domain, to be used on shmobile
   SoCs without device power domains (R-Car Gen1 and Gen2, RZ).  This allows
   to power-manage the module clocks of SoC devices that are part of the
   CPG/MSTP Clock Domain using Runtime PM, or for system suspend/resume,
   similar to SoCs with device power domains (SH-Mobile and R-Mobile)."

* tag 'renesas-soc-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas:
  ARM: shmobile: R-Mobile: Use CPG/MSTP Clock Domain attach/detach helpers
  clk: shmobile: mstp: Consider "zb_clk" suitable for power management
2015-10-06 16:42:07 +02:00
Linus Torvalds
049e6dde7e Linux 4.3-rc4 2015-10-04 16:57:17 +01:00
Linus Torvalds
30c44659f4 Merge branch 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull strscpy string copy function implementation from Chris Metcalf.

Chris sent this during the merge window, but I waffled back and forth on
the pull request, which is why it's going in only now.

The new "strscpy()" function is definitely easier to use and more secure
than either strncpy() or strlcpy(), both of which are horrible nasty
interfaces that have serious and irredeemable problems.

strncpy() has a useless return value, and doesn't NUL-terminate an
overlong result.  To make matters worse, it pads a short result with
zeroes, which is a performance disaster if you have big buffers.

strlcpy(), by contrast, is a mis-designed "fix" for strlcpy(), lacking
the insane NUL padding, but having a differently broken return value
which returns the original length of the source string.  Which means
that it will read characters past the count from the source buffer, and
you have to trust the source to be properly terminated.  It also makes
error handling fragile, since the test for overflow is unnecessarily
subtle.

strscpy() avoids both these problems, guaranteeing the NUL termination
(but not excessive padding) if the destination size wasn't zero, and
making the overflow condition very obvious by returning -E2BIG.  It also
doesn't read past the size of the source, and can thus be used for
untrusted source data too.

So why did I waffle about this for so long?

Every time we introduce a new-and-improved interface, people start doing
these interminable series of trivial conversion patches.

And every time that happens, somebody does some silly mistake, and the
conversion patch to the improved interface actually makes things worse.
Because the patch is mindnumbing and trivial, nobody has the attention
span to look at it carefully, and it's usually done over large swatches
of source code which means that not every conversion gets tested.

So I'm pulling the strscpy() support because it *is* a better interface.
But I will refuse to pull mindless conversion patches.  Use this in
places where it makes sense, but don't do trivial patches to fix things
that aren't actually known to be broken.

* 'strscpy' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  tile: use global strscpy() rather than private copy
  string: provide strscpy()
  Make asm/word-at-a-time.h available on all architectures
2015-10-04 16:31:13 +01:00
Linus Torvalds
15ecf9a986 Assorted fixes for md in 4.3-rc
Two tagged for -stable
 One is really a cleanup to match and improve kmemcache interface.
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Merge tag 'md/4.3-fixes' of git://neil.brown.name/md

Pull md fixes from Neil Brown:
 "Assorted fixes for md in 4.3-rc.

  Two tagged for -stable, and one is really a cleanup to match and
  improve kmemcache interface.

* tag 'md/4.3-fixes' of git://neil.brown.name/md:
  md/bitmap: don't pass -1 to bitmap_storage_alloc.
  md/raid1: Avoid raid1 resync getting stuck
  md: drop null test before destroy functions
  md: clear CHANGE_PENDING in readonly array
  md/raid0: apply base queue limits *before* disk_stack_limits
  md/raid5: don't index beyond end of array in need_this_block().
  raid5: update analysis state for failed stripe
  md: wait for pending superblock updates before switching to read-only
2015-10-04 11:47:28 +01:00
Linus Torvalds
0d8770815f Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle:
 "This week's round of MIPS fixes:
   - Fix JZ4740 build
   - Fix fallback to GFP_DMA
   - FP seccomp in case of ENOSYS
   - Fix bootmem panic
   - A number of FP and CPS fixes
   - Wire up new syscalls
   - Make sure BPF assembler objects can properly be disassembled
   - Fix BPF assembler code for MIPS I"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: scall: Always run the seccomp syscall filters
  MIPS: Octeon: Fix kernel panic on startup from memory corruption
  MIPS: Fix R2300 FP context switch handling
  MIPS: Fix octeon FP context switch handling
  MIPS: BPF: Fix load delay slots.
  MIPS: BPF: Do all exports of symbols with FEXPORT().
  MIPS: Fix the build on jz4740 after removing the custom gpio.h
  MIPS: CPS: #ifdef on CONFIG_MIPS_MT_SMP rather than CONFIG_MIPS_MT
  MIPS: CPS: Don't include MT code in non-MT kernels.
  MIPS: CPS: Stop dangling delay slot from has_mt.
  MIPS: dma-default: Fix 32-bit fall back to GFP_DMA
  MIPS: Wire up userfaultfd and membarrier syscalls.
2015-10-04 11:41:58 +01:00
Linus Torvalds
3e519dde1e Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Thomas Gleixner:
 "This update contains:

   - Fix for a long standing race affecting /proc/irq/NNN

   - One line fix for ARM GICV3-ITS counting the wrong data

   - Warning silencing in ARM GICV3-ITS.  Another GCC trying to be
     overly clever issue"

* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/gic-v3-its: Count additional LPIs for the aliased devices
  irqchip/gic-v3-its: Silence warning when its_lpi_alloc_chunks gets inlined
  genirq: Fix race in register_irq_proc()
2015-10-04 11:40:09 +01:00
Markos Chandras
d218af7849 MIPS: scall: Always run the seccomp syscall filters
The MIPS syscall handler code used to return -ENOSYS on invalid
syscalls. Whilst this is expected, it caused problems for seccomp
filters because the said filters never had the change to run since
the code returned -ENOSYS before triggering them. This caused
problems on the chromium testsuite for filters looking for invalid
syscalls. This has now changed and the seccomp filters are always
run even if the syscall is invalid. We return -ENOSYS once we
return from the seccomp filters. Moreover, similar codepaths have
been merged in the process which simplifies somewhat the overall
syscall code.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11236/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-10-04 12:10:56 +02:00
Linus Torvalds
2cf30826bb Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
 "Fixes all around the map: W+X kernel mapping fix, WCHAN fixes, two
  build failure fixes for corner case configs, x32 header fix and a
  speling fix"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/headers/uapi: Fix __BITS_PER_LONG value for x32 builds
  x86/mm: Set NX on gap between __ex_table and rodata
  x86/kexec: Fix kexec crash in syscall kexec_file_load()
  x86/process: Unify 32bit and 64bit implementations of get_wchan()
  x86/process: Add proper bound checks in 64bit get_wchan()
  x86, efi, kasan: Fix build failure on !KASAN && KMEMCHECK=y kernels
  x86/hyperv: Fix the build in the !CONFIG_KEXEC_CORE case
  x86/cpufeatures: Correct spelling of the HWP_NOTIFY flag
2015-10-03 10:53:05 -04:00
Linus Torvalds
37cc7ab1d2 Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
 "An abs64() fix in the watchdog driver, and two clocksource driver
  NO_IRQ assumption fixes"

* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource: Fix abs() usage w/ 64bit values
  clocksource/drivers/keystone: Fix bad NO_IRQ usage
  clocksource/drivers/rockchip: Fix bad NO_IRQ usage
2015-10-03 10:51:41 -04:00
Linus Torvalds
a758379b03 Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar:
 "Two EFI fixes: one for x86, one for ARM, fixing a boot crash bug that
  can trigger under newer EFI firmware"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  arm64/efi: Fix boot crash by not padding between EFI_MEMORY_RUNTIME regions
  x86/efi: Fix boot crash by mapping EFI memmap entries bottom-up at runtime, instead of top-down
2015-10-03 10:46:41 -04:00
Linus Torvalds
14f97d9713 Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
 "Bunch of fixes all over the place, all pretty small: amdgpu, i915,
  exynos, one qxl and one vmwgfx.

  There is also a bunch of mst fixes, I left some cleanups in the series
  as I didn't think it was worth splitting up the tested series"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (37 commits)
  drm/dp/mst: add some defines for logical/physical ports
  drm/dp/mst: drop cancel work sync in the mstb destroy path (v2)
  drm/dp/mst: split connector registration into two parts (v2)
  drm/dp/mst: update the link_address_sent before sending the link address (v3)
  drm/dp/mst: fixup handling hotplug on port removal.
  drm/dp/mst: don't pass port into the path builder function
  drm/radeon: drop radeon_fb_helper_set_par
  drm: handle cursor_set2 in restore_fbdev_mode
  drm/exynos: Staticize local function in exynos_drm_gem.c
  drm/exynos: fimd: actually disable dp clock
  drm/exynos: dp: remove suspend/resume functions
  drm/qxl: recreate the primary surface when the bo is not primary
  drm/amdgpu: only print meaningful VM faults
  drm/amdgpu/cgs: remove import_gpu_mem
  drm/i915: Call non-locking version of drm_kms_helper_poll_enable(), v2
  drm: Add a non-locking version of drm_kms_helper_poll_enable(), v2
  drm/vmwgfx: Fix a command submission hang regression
  drm/exynos: remove unused mode_fixup() code
  drm/exynos: remove decon_mode_fixup()
  drm/exynos: remove fimd_mode_fixup()
  ...
2015-10-03 10:39:31 -04:00
Linus Torvalds
978ab6a009 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
Pull input layer fixes from Dmitry Torokhov:
 "Fixes for two recent regressions (in Synaptics PS/2 and uinput
  drivers) and some more driver fixups"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Revert "Input: synaptics - fix handling of disabling gesture mode"
  Input: psmouse - fix data race in __ps2_command
  Input: elan_i2c - add all valid ic type for i2c/smbus
  Input: zhenhua - ensure we have BITREVERSE
  Input: omap4-keypad - fix memory leak
  Input: serio - fix blocking of parport
  Input: uinput - fix crash when using ABS events
  Input: elan_i2c - expand maximum product_id form 0xFF to 0xFFFF
  Input: elan_i2c - add ic type 0x03
  Input: elan_i2c - don't require known iap version
  Input: imx6ul_tsc - fix controller name
  Input: imx6ul_tsc - use the preferred method for kzalloc()
  Input: imx6ul_tsc - check for negative return value
  Input: imx6ul_tsc - propagate the errors
  Input: walkera0701 - fix abs() calculations on 64 bit values
  Input: mms114 - remove unneded semicolons
  Input: pm8941-pwrkey - remove unneded semicolon
  Input: fix typo in MT documentation
  Input: cyapa - fix address of Gen3 devices in device tree documentation
2015-10-02 17:53:25 -04:00
John Stultz
67dfae0cd7 clocksource: Fix abs() usage w/ 64bit values
This patch fixes one cases where abs() was being used with 64-bit
nanosecond values, where the result may be capped at 32-bits.

This potentially could cause watchdog false negatives on 32-bit
systems, so this patch addresses the issue by using abs64().

Signed-off-by: John Stultz <john.stultz@linaro.org>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1442279124-7309-2-git-send-email-john.stultz@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-02 22:53:01 +02:00
Linus Torvalds
5634347dee - Fix for transparent huge page change_protection() logic which was
inadvertently changing a huge pmd page into a pmd table entry.
 - Function graph tracer panic fix caused by the return_to_handler code
   corrupting the multi-regs function return value (composite types).
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - Fix for transparent huge page change_protection() logic which was
   inadvertently changing a huge pmd page into a pmd table entry.

 - Function graph tracer panic fix caused by the return_to_handler code
   corrupting the multi-regs function return value (composite types).

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: ftrace: fix function_graph tracer panic
  arm64: Fix THP protection change logic
2015-10-02 14:54:16 -04:00
Linus Torvalds
b55a97e759 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k
Pull m68k updates from Geert Uytterhoeven:
 "Summary:
   - Fix for accidental modification of arguments of syscall functions
   - Wire up new syscalls
   - Update defconfigs"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
  m68k/defconfig: Update defconfigs for v4.3-rc1
  m68k: Define asmlinkage_protect
  m68k: Wire up membarrier
  m68k: Wire up userfaultfd
  m68k: Wire up direct socket calls
2015-10-02 14:51:46 -04:00
Marc Zyngier
791c76d584 irqchip/gic-v3-its: Count additional LPIs for the aliased devices
When configuring the interrupt mapping for a new device, we
iterate over all the possible aliases to account for their
maximum MSI allocation. This was introduced by e8137f4f50
("irqchip: gicv3-its: Iterate over PCI aliases to generate ITS configuration").

Turns out that the code doing that is a bit braindead, and repeatedly
accounts for the same device over and over.

Fix this by counting the actual alias that is passed to us by the
core code.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Alex Shi <alex.shi@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1443800646-8074-3-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-02 20:51:41 +02:00
Marc Zyngier
c8415b9470 irqchip/gic-v3-its: Silence warning when its_lpi_alloc_chunks gets inlined
More agressive inlining in recent versions of GCC have uncovered
a new set of warnings:

 drivers/irqchip/irq-gic-v3-its.c: In function its_msi_prepare:
  drivers/irqchip/irq-gic-v3-its.c:1148:26: warning: lpi_base may be used
    uninitialized in this function [-Wmaybe-uninitialized]
     dev->event_map.lpi_base = lpi_base;
                          ^
 drivers/irqchip/irq-gic-v3-its.c:1116:6: note: lpi_base was declared here
  int lpi_base;
	      ^
 drivers/irqchip/irq-gic-v3-its.c:1149:25: warning: nr_lpis may be used
  uninitialized in this function [-Wmaybe-uninitialized]
   dev->event_map.nr_lpis = nr_lpis;
	                         ^
 drivers/irqchip/irq-gic-v3-its.c:1117:6: note: nr_lpis was declared here
  int nr_lpis;
	      ^
The warning is fairly benign (there is no code path that could
actually use uninitialized variables), but let's silence it anyway
by zeroing the variables on the error path.

Reported-by: Alex Shi <alex.shi@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Link: http://lkml.kernel.org/r/1443800646-8074-2-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-02 20:51:41 +02:00
Linus Torvalds
83dc311ce0 dmaengine fixes for 4.3-rc4
This contains fixes spread throughout the drivers
    Also fixes one more instance of privatecnt in dmaengine
    bunch of pxa_dma fixes for reuse of descriptor issue, residue and
    no-requestor
    odd fixes in xgene, idma, sun4i and zxdma
    at_xdmac fixes for cleaning descriptor and block addr mode
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Merge tag 'dmaengine-fix-4.3-rc4' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "This contains fixes spread throughout the drivers, and also fixes one
  more instance of privatecnt in dmaengine.

  Driver fixes summary:
   - bunch of pxa_dma fixes for reuse of descriptor issue, residue and
     no-requestor
   - odd fixes in xgene, idma, sun4i and zxdma
   - at_xdmac fixes for cleaning descriptor and block addr mode"

* tag 'dmaengine-fix-4.3-rc4' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: pxa_dma: fix residue corner case
  dmaengine: pxa_dma: fix the no-requestor case
  dmaengine: zxdma: Fix off-by-one for testing valid pchan request
  dmaengine: at_xdmac: clean used descriptor
  dmaengine: at_xdmac: change block increment addressing mode
  dmaengine: dw: properly read DWC_PARAMS register
  dmaengine: xgene-dma: Fix overwritting DMA tx ring
  dmaengine: fix balance of privatecnt
  dmaengine: sun4i: fix unsafe list iteration
  dmaengine: idma64: improve residue estimation
  dmaengine: xgene-dma: fix handling xgene_dma_get_ring_size result
  dmaengine: pxa_dma: fix initial list move
2015-10-02 14:46:15 -04:00
Linus Torvalds
27728bf04b Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
 "Another week, another round of fixes.

  These have been brewing for a bit and in various iterations, but I
  feel pretty comfortable about the quality of them.  They fix real
  issues.  The pull request is mostly blk-mq related, and the only one
  not fixing a real bug, is the tag iterator abstraction from Christoph.
  But it's pretty trivial, and we'll need it for another fix soon.

  Apart from the blk-mq fixes, there's an NVMe affinity fix from Keith,
  and a single fix for xen-blkback from Roger fixing failure to free
  requests on disconnect"

* 'for-linus' of git://git.kernel.dk/linux-block:
  blk-mq: factor out a helper to iterate all tags for a request_queue
  blk-mq: fix racy updates of rq->errors
  blk-mq: fix deadlock when reading cpu_list
  blk-mq: avoid inserting requests before establishing new mapping
  blk-mq: fix q->mq_usage_counter access race
  blk-mq: Fix use after of free q->mq_map
  blk-mq: fix sysfs registration/unregistration race
  blk-mq: avoid setting hctx->tags->cpumask before allocation
  NVMe: Set affinity after allocating request queues
  xen/blkback: free requests on disconnection
2015-10-02 14:40:57 -04:00
Dmitry Torokhov
62d7846144 Revert "Input: synaptics - fix handling of disabling gesture mode"
This reverts commit e51e38494a: we
actually do want the device to work in extended W mode, as this is the
mode that allows us receiving multiple contact information.

Cc: stable@vger.kernel.org
2015-10-02 10:31:32 -07:00
Matt Bennett
66803dd919 MIPS: Octeon: Fix kernel panic on startup from memory corruption
During development it was found that a number of builds would panic
during the kernel init process, more specifically in 'delayed_fput()'.
The panic showed the kernel trying to access a memory address of
'0xb7fdc00' while traversing the 'delayed_fput_list' structure.
Comparing this memory address to the value of the pointer used on
builds that did not panic confirmed that the pointer on crashing
builds must have been corrupted at some stage earlier in the init
process.

By traversing the list earlier and earlier in the code it was found
that 'plat_mem_setup()' was responsible for corrupting the list.
Specifically the line:

    memory = cvmx_bootmem_phy_alloc(mem_alloc_size,
			__pa_symbol(&__init_end), -1,
			0x100000,
			CVMX_BOOTMEM_FLAG_NO_LOCKING);

Which would eventually call:

    cvmx_bootmem_phy_set_size(new_ent_addr,
		cvmx_bootmem_phy_get_size
		(ent_addr) -
		(desired_min_addr -
			ent_addr));

Where 'new_ent_addr'=0x4800000 (the address of 'delayed_fput_list')
and the second argument (size)=0xb7fdc00 (the address causing the
kernel panic). The job of this part of 'plat_mem_setup()' is to
allocate chunks of memory for the kernel to use. At the start of
each chunk of memory the size of the chunk is written, hence the
value 0xb7fdc00 is written onto memory at 0x4800000, therefore the
kernel panics when it goes back to access 'delayed_fput_list' later
on in the initialisation process.

On builds that were not crashing it was found that the compiler had
placed 'delayed_fput_list' at 0x4800008, meaning it wasn't corrupted
(but something else in memory was overwritten).

As can be seen in the first function call above the code begins to
allocate chunks of memory beginning from the symbol '__init_end'.
The MIPS linker script (vmlinux.lds.S) however defines the .bss
section to begin after '__init_end'. Therefore memory within the
.bss section is allocated to the kernel to use (System.map shows
'delayed_fput_list' and other kernel structures to be in .bss).

To stop the kernel panic (and the .bss section being corrupted)
memory should begin being allocated from the symbol '_end'.

Signed-off-by: Matt Bennett <matt.bennett@alliedtelesis.co.nz>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: aleksey.makarov@auriga.com
Patchwork: https://patchwork.linux-mips.org/patch/11251/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-10-02 19:19:55 +02:00
Paul Burton
085c2f25d3 MIPS: Fix R2300 FP context switch handling
Commit 1a3d59579b ("MIPS: Tidy up FPU context switching") removed FP
context saving from the asm-written resume function in favour of reusing
existing code to perform the same task. However it only removed the FP
context saving code from the r4k_switch.S implementation of resume.
Remove it from the r2300_switch.S implementation too in order to prevent
attempting to save the FP context twice, which would likely lead to an
exception from the second save because the FPU had already been disabled
by the first save.

This patch has only been build tested, using rbtx49xx_defconfig.

Fixes: 1a3d59579b ("MIPS: Tidy up FPU context switching")
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-kernel@vger.kernel.org
Cc: Manuel Lauss <manuel.lauss@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/11167/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-10-02 19:16:46 +02:00
Paul Burton
0fa24340f7 MIPS: Fix octeon FP context switch handling
Commit 1a3d59579b ("MIPS: Tidy up FPU context switching") removed FP
context saving from the asm-written resume function in favour of reusing
existing code to perform the same task. However it only removed the FP
context saving code from the r4k_switch.S implementation of resume.
Octeon uses its own implementation in octeon_switch.S, so remove FP
context saving there too in order to prevent attempting to save context
twice. That formerly led to an exception from the second save as follows
because the FPU had already been disabled by the first save:

    do_cpu invoked from kernel context![#1]:
    CPU: 0 PID: 2 Comm: kthreadd Not tainted 4.3.0-rc2-dirty #2
    task: 800000041f84a008 ti: 800000041f864000 task.ti: 800000041f864000
    $ 0   : 0000000000000000 0000000010008ce1 0000000000100000 ffffffffbfffffff
    $ 4   : 800000041f84a008 800000041f84ac08 800000041f84c000 0000000000000004
    $ 8   : 0000000000000001 0000000000000000 0000000000000000 0000000000000001
    $12   : 0000000010008ce3 0000000000119c60 0000000000000036 800000041f864000
    $16   : 800000041f84ac08 800000000792ce80 800000041f84a008 ffffffff81758b00
    $20   : 0000000000000000 ffffffff8175ae50 0000000000000000 ffffffff8176c740
    $24   : 0000000000000006 ffffffff81170300
    $28   : 800000041f864000 800000041f867d90 0000000000000000 ffffffff815f3fa0
    Hi    : 0000000000fa8257
    Lo    : ffffffffe15cfc00
    epc   : ffffffff8112821c resume+0x9c/0x200
    ra    : ffffffff815f3fa0 __schedule+0x3f0/0x7d8
    Status: 10008ce2        KX SX UX KERNEL EXL
    Cause : 1080002c (ExcCode 0b)
    PrId  : 000d0601 (Cavium Octeon+)
    Modules linked in:
    Process kthreadd (pid: 2, threadinfo=800000041f864000, task=800000041f84a008, tls=0000000000000000)
    Stack : ffffffff81604218 ffffffff815f7e08 800000041f84a008 ffffffff811681b0
              800000041f84a008 ffffffff817e9878 0000000000000000 ffffffff81770000
              ffffffff81768340 ffffffff81161398 0000000000000001 0000000000000000
              0000000000000000 ffffffff815f4424 0000000000000000 ffffffff81161d68
              ffffffff81161be8 0000000000000000 0000000000000000 0000000000000000
              0000000000000000 0000000000000000 0000000000000000 ffffffff8111e16c
              0000000000000000 0000000000000000 0000000000000000 0000000000000000
              0000000000000000 0000000000000000 0000000000000000 0000000000000000
              0000000000000000 0000000000000000 0000000000000000 0000000000000000
              0000000000000000 0000000000000000 0000000000000000 0000000000000000
              ...
    Call Trace:
    [<ffffffff8112821c>] resume+0x9c/0x200
    [<ffffffff815f3fa0>] __schedule+0x3f0/0x7d8
    [<ffffffff815f4424>] schedule+0x34/0x98
    [<ffffffff81161d68>] kthreadd+0x180/0x198
    [<ffffffff8111e16c>] ret_from_kernel_thread+0x14/0x1c

Tested using cavium_octeon_defconfig on an EdgeRouter Lite.

Fixes: 1a3d59579b ("MIPS: Tidy up FPU context switching")
Reported-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-kernel@vger.kernel.org
Cc: Chandrakala Chavva <cchavva@caviumnetworks.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Leonid Rosenboim <lrosenboim@caviumnetworks.com>
Patchwork: https://patchwork.linux-mips.org/patch/11166/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-10-02 19:16:06 +02:00
Linus Torvalds
36f8dafe52 MMC core:
- Allow users of mmc_of_parse() to succeed when CONFIG_GPIOLIB is unset
  - Prevent infinite loop of re-tuning for CRC-errors for CMD19 and CMD21
 
 MMC host:
  - pxamci: Fix issues with card detect
  - sunxi: Fix clk-delay settings
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Merge tag 'mmc-v4.3-rc3' of git://git.linaro.org/people/ulf.hansson/mmc

Pull MMC fixes from Ulf Hansson:
 "Here are some mmc fixes intended for v4.3 rc4:

  MMC core:
   - Allow users of mmc_of_parse() to succeed when CONFIG_GPIOLIB is
     unset
   - Prevent infinite loop of re-tuning for CRC-errors for CMD19 and
     CMD21

   MMC host:
   - pxamci: Fix issues with card detect
   - sunxi: Fix clk-delay settings"

* tag 'mmc-v4.3-rc3' of git://git.linaro.org/people/ulf.hansson/mmc:
  mmc: core: fix dead loop of mmc_retune
  mmc: pxamci: fix card detect with slot-gpio API
  mmc: sunxi: Fix clk-delay settings
  mmc: core: Don't return an error for CD/WP GPIOs when GPIOLIB is unset
2015-10-02 08:03:04 -04:00
Linus Torvalds
8c25ab8b5a Merge git://git.infradead.org/intel-iommu
Pull IOVA fixes from David Woodhouse:
 "The main fix here is the first one, fixing the over-allocation of
   size-aligned requests.  The other patches simply make the existing
  IOVA code available to users other than the Intel VT-d driver, with no
  functional change.

  I concede the latter really *should* have been submitted during the
  merge window, but since it's basically risk-free and people are
  waiting to build on top of it and it's my fault I didn't get it in, I
  (and they) would be grateful if you'd take it"

* git://git.infradead.org/intel-iommu:
  iommu: Make the iova library a module
  iommu: iova: Export symbols
  iommu: iova: Move iova cache management to the iova library
  iommu/iova: Avoid over-allocating when size-aligned
2015-10-02 07:59:29 -04:00
Li Bin
ee556d00cf arm64: ftrace: fix function_graph tracer panic
When function graph tracer is enabled, the following operation
will trigger panic:

mount -t debugfs nodev /sys/kernel
echo next_tgid > /sys/kernel/tracing/set_ftrace_filter
echo function_graph > /sys/kernel/tracing/current_tracer
ls /proc/

------------[ cut here ]------------
[  198.501417] Unable to handle kernel paging request at virtual address cb88537fdc8ba316
[  198.506126] pgd = ffffffc008f79000
[  198.509363] [cb88537fdc8ba316] *pgd=00000000488c6003, *pud=00000000488c6003, *pmd=0000000000000000
[  198.517726] Internal error: Oops: 94000005 [#1] SMP
[  198.518798] Modules linked in:
[  198.520582] CPU: 1 PID: 1388 Comm: ls Tainted: G
[  198.521800] Hardware name: linux,dummy-virt (DT)
[  198.522852] task: ffffffc0fa9e8000 ti: ffffffc0f9ab0000 task.ti: ffffffc0f9ab0000
[  198.524306] PC is at next_tgid+0x30/0x100
[  198.525205] LR is at return_to_handler+0x0/0x20
[  198.526090] pc : [<ffffffc0002a1070>] lr : [<ffffffc0000907c0>] pstate: 60000145
[  198.527392] sp : ffffffc0f9ab3d40
[  198.528084] x29: ffffffc0f9ab3d40 x28: ffffffc0f9ab0000
[  198.529406] x27: ffffffc000d6a000 x26: ffffffc000b786e8
[  198.530659] x25: ffffffc0002a1900 x24: ffffffc0faf16c00
[  198.531942] x23: ffffffc0f9ab3ea0 x22: 0000000000000002
[  198.533202] x21: ffffffc000d85050 x20: 0000000000000002
[  198.534446] x19: 0000000000000002 x18: 0000000000000000
[  198.535719] x17: 000000000049fa08 x16: ffffffc000242efc
[  198.537030] x15: 0000007fa472b54c x14: ffffffffff000000
[  198.538347] x13: ffffffc0fada84a0 x12: 0000000000000001
[  198.539634] x11: ffffffc0f9ab3d70 x10: ffffffc0f9ab3d70
[  198.540915] x9 : ffffffc0000907c0 x8 : ffffffc0f9ab3d40
[  198.542215] x7 : 0000002e330f08f0 x6 : 0000000000000015
[  198.543508] x5 : 0000000000000f08 x4 : ffffffc0f9835ec0
[  198.544792] x3 : cb88537fdc8ba316 x2 : cb88537fdc8ba306
[  198.546108] x1 : 0000000000000002 x0 : ffffffc000d85050
[  198.547432]
[  198.547920] Process ls (pid: 1388, stack limit = 0xffffffc0f9ab0020)
[  198.549170] Stack: (0xffffffc0f9ab3d40 to 0xffffffc0f9ab4000)
[  198.582568] Call trace:
[  198.583313] [<ffffffc0002a1070>] next_tgid+0x30/0x100
[  198.584359] [<ffffffc0000907bc>] ftrace_graph_caller+0x6c/0x70
[  198.585503] [<ffffffc0000907bc>] ftrace_graph_caller+0x6c/0x70
[  198.586574] [<ffffffc0000907bc>] ftrace_graph_caller+0x6c/0x70
[  198.587660] [<ffffffc0000907bc>] ftrace_graph_caller+0x6c/0x70
[  198.588896] Code: aa0003f5 2a0103f4 b4000102 91004043 (885f7c60)
[  198.591092] ---[ end trace 6a346f8f20949ac8 ]---

This is because when using function graph tracer, if the traced
function return value is in multi regs ([x0-x7]), return_to_handler
may corrupt them. So in return_to_handler, the parameter regs should
be protected properly.

Cc: <stable@vger.kernel.org> # 3.18+
Signed-off-by: Li Bin <huawei.libin@huawei.com>
Acked-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-10-02 11:12:56 +01:00