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a8f40111d1
linux/drivers/remoteproc
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Brandon Maier a8f40111d1 remoteproc: Initialize rproc_class before use 
The remoteproc_core and remoteproc drivers all initialize with module_init().
However remoteproc drivers need the rproc_class during their probe. If one of
the remoteproc drivers runs init and gets through probe before
remoteproc_init() runs, a NULL pointer access of rproc_class's `glue_dirs`
spinlock occurs.

> Unable to handle kernel NULL pointer dereference at virtual address 000000dc
> pgd = c0004000
> [000000dc] *pgd=00000000
> Internal error: Oops: 5 [#1] PREEMPT ARM
> Modules linked in:
> CPU: 0 PID: 1 Comm: swapper Tainted: G        W       4.14.106-rt56 #1
> Hardware name: Generic OMAP36xx (Flattened Device Tree)
> task: c6050000 task.stack: c604a000
> PC is at rt_spin_lock+0x40/0x6c
> LR is at rt_spin_lock+0x28/0x6c
> pc : [<c0523c90>]    lr : [<c0523c78>]    psr: 60000013
> sp : c604bdc0  ip : 00000000  fp : 00000000
> r10: 00000000  r9 : c61c7c10  r8 : c6269c20
> r7 : c0905888  r6 : c6269c20  r5 : 00000000  r4 : 000000d4
> r3 : 000000dc  r2 : c6050000  r1 : 00000002  r0 : 000000d4
> Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
...
> [<c0523c90>] (rt_spin_lock) from [<c03b65a4>] (get_device_parent+0x54/0x17c)
> [<c03b65a4>] (get_device_parent) from [<c03b6bec>] (device_add+0xe0/0x5b4)
> [<c03b6bec>] (device_add) from [<c042adf4>] (rproc_add+0x18/0xd8)
> [<c042adf4>] (rproc_add) from [<c01110e4>] (my_rproc_probe+0x158/0x204)
> [<c01110e4>] (my_rproc_probe) from [<c03bb6b8>] (platform_drv_probe+0x34/0x70)
> [<c03bb6b8>] (platform_drv_probe) from [<c03b9dd4>] (driver_probe_device+0x2c8/0x420)
> [<c03b9dd4>] (driver_probe_device) from [<c03ba02c>] (__driver_attach+0x100/0x11c)
> [<c03ba02c>] (__driver_attach) from [<c03b7d08>] (bus_for_each_dev+0x7c/0xc0)
> [<c03b7d08>] (bus_for_each_dev) from [<c03b910c>] (bus_add_driver+0x1cc/0x264)
> [<c03b910c>] (bus_add_driver) from [<c03ba714>] (driver_register+0x78/0xf8)
> [<c03ba714>] (driver_register) from [<c010181c>] (do_one_initcall+0x100/0x190)
> [<c010181c>] (do_one_initcall) from [<c0800de8>] (kernel_init_freeable+0x130/0x1d0)
> [<c0800de8>] (kernel_init_freeable) from [<c051eee8>] (kernel_init+0x8/0x114)
> [<c051eee8>] (kernel_init) from [<c01175b0>] (ret_from_fork+0x14/0x24)
> Code: e2843008 e3c2203f f5d3f000 e5922010 (e193cf9f)
> ---[ end trace 0000000000000002 ]---

Signed-off-by: Brandon Maier <brandon.maier@rockwellcollins.com>
Link: https://lore.kernel.org/r/20190530225223.136420-1-brandon.maier@rockwellcollins.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2020-01-20 10:41:34 -08:00
..
da8xx_remoteproc.c remoteproc: Remove dev_err() usage after platform_get_irq() 2019-08-26 21:59:58 -07:00
imx_rproc.c remoteproc updates for v5.3 2019-07-17 11:44:41 -07:00
Kconfig rpmsg: add rpmsg support for mt8183 SCP. 2020-01-20 10:29:56 -08:00
keystone_remoteproc.c remoteproc: Remove dev_err() usage after platform_get_irq() 2019-08-26 21:59:58 -07:00
Makefile remoteproc/mediatek: add SCP support for mt8183 2020-01-20 10:29:54 -08:00
mtk_common.h rpmsg: add rpmsg support for mt8183 SCP. 2020-01-20 10:29:56 -08:00
mtk_scp_ipi.c rpmsg: add rpmsg support for mt8183 SCP. 2020-01-20 10:29:56 -08:00
mtk_scp.c rpmsg: add rpmsg support for mt8183 SCP. 2020-01-20 10:29:56 -08:00
omap_remoteproc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
omap_remoteproc.h
qcom_common.c remoteproc: qcom: Move glink_ssr notification after stop 2019-07-24 16:01:14 -07:00
qcom_common.h remoteproc: qcom: Introduce sysmon 2018-02-12 16:57:22 -08:00
qcom_q6v5_adsp.c remoteproc: qcom: qdsp6-adsp: Add support for QCS404 CDSP 2019-05-21 23:52:52 -07:00
qcom_q6v5_mss.c remoteproc: mss: q6v5-mss: Add modem support on SC7180 2019-12-20 10:47:12 -08:00
qcom_q6v5_pas.c remoteproc: qcom: pas: Add MSM8998 ADSP and SLPI support 2019-12-20 09:58:53 -08:00
qcom_q6v5_wcss.c remoteproc: qcom: Introduce Hexagon V5 based WCSS driver 2018-06-18 15:57:58 -07:00
qcom_q6v5.c remoteproc: Remove dev_err() usage after platform_get_irq() 2019-08-26 21:59:58 -07:00
qcom_q6v5.h remoteproc: q6v5: Extract common resource handling 2018-06-18 15:55:57 -07:00
qcom_sysmon.c remoteproc: qcom: Remove unneeded semicolon 2019-12-18 23:13:29 -08:00
qcom_wcnss_iris.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
qcom_wcnss.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
qcom_wcnss.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
remoteproc_core.c remoteproc: Initialize rproc_class before use 2020-01-20 10:41:34 -08:00
remoteproc_debugfs.c remoteproc: debug: Remove unneeded NULL check 2019-10-04 21:11:57 -07:00
remoteproc_elf_loader.c remoteproc updates for v5.3 2019-07-17 11:44:41 -07:00
remoteproc_internal.h remoteproc updates for v5.3 2019-07-17 11:44:41 -07:00
remoteproc_sysfs.c remoteproc: Add a sysfs interface for name 2019-08-26 14:50:16 -07:00
remoteproc_virtio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
st_remoteproc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
st_slim_rproc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
stm32_rproc.c remoteproc: stm32: fix probe error case 2019-11-18 20:35:16 -08:00
wkup_m3_rproc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00