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f9d1f7a7ad
linux-next/arch/arm/mach-imx
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Fabio Estevam f9d1f7a7ad ARM: imx: gpc: Fix the imx_gpc_genpd_init() error path 
If of_genpd_add_provider_onecell() fails the following kernel crash is
observed on a kernel built with multi_v7_defconfig:

[    1.739301] [00000040] *pgd=00000000
[    1.739310] Internal error: Oops: 5 [#1] SMP ARM
[    1.739319] Modules linked in:
[    1.739328] CPU: 1 PID: 95 Comm: kworker/1:4 Not tainted 4.8.0-11897-g6b5e09a #1
[    1.739331] Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[    1.739352] Workqueue: pm genpd_power_off_work_fn
[    1.739356] task: ee63d400 task.stack: ee70a000
[    1.739365] PC is at mutex_lock+0xc/0x4c
[    1.739374] LR is at regulator_disable+0x2c/0x60
[    1.739379] pc : [<c0bc0da0>]    lr : [<c06e4b10>]    psr: 60000013
[    1.739379] sp : ee70beb0  ip : 10624dd3  fp : ee6e6280
[    1.739382] r10: eefb0900  r9 : 00000000  r8 : c1309918
[    1.739385] r7 : 00000000  r6 : 00000040  r5 : 00000000  r4 : 00000040
[    1.739390] r3 : 0000004c  r2 : 7fffd540  r1 : 000001e4  r0 : 00000040

Instead of returning of_genpd_add_provider_onecell() directly,
we should check its return value and in the case of error we
should unwind the previously taken actions, which in these case are:
- Call imx6q_pm_pu_power_off()
- Set imx6q_pu_domain.reg back to NULL

Setting imx6q_pu_domain.reg to NULL in the error case is important
as it will prevent further operations in the pu_reg regulator.

This kernel crash is not observed with imx_v6_v7_defconfig because
it selects GPU and VPU drivers, which are consumers of the GPC block
and thus change the refcount of the pu_reg regulator.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2016-10-24 15:13:02 +08:00
..
devices ARM: imx: remove platform-mxc_rnga 2016-08-16 13:59:15 +08:00
3ds_debugboard.c ARM: imx: use endian-safe readl/readw/writel/writew 2016-02-02 13:24:17 +08:00
3ds_debugboard.h ARM: imx: include board headers in the same folder 2012-10-15 09:18:14 +08:00
anatop.c ARM: imx: Add msl code support for imx6qp 2016-02-14 11:07:17 +08:00
avic.c ARM: i.MX: Fix FIQ interrupt handling for TZIC 2016-06-21 15:57:05 +08:00
board-mx31lilly.h ARM: imx: include board headers in the same folder 2012-10-15 09:18:14 +08:00
board-mx31lite.h ARM: imx: include board headers in the same folder 2012-10-15 09:18:14 +08:00
board-mx31moboard.h ARM: imx: include board headers in the same folder 2012-10-15 09:18:14 +08:00
common.h ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
cpu-imx5.c ARM: imx: remove last call to cpu_is_mx5* 2016-06-28 10:26:42 +08:00
cpu-imx25.c ARM: mx25: Retrieve IIM base from dt 2015-03-13 22:06:35 +08:00
cpu-imx27.c ARM: imx: use endian-safe readl/readw/writel/writew 2016-02-02 13:24:17 +08:00
cpu-imx31.c ARM: imx: use endian-safe readl/readw/writel/writew 2016-02-02 13:24:17 +08:00
cpu-imx35.c ARM: imx: use endian-safe readl/readw/writel/writew 2016-02-02 13:24:17 +08:00
cpu.c ARM: imx: remove cpu_is_mx*() 2016-06-28 10:26:45 +08:00
cpuidle-imx5.c cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic 2014-11-12 21:17:27 +01:00
cpuidle-imx6q.c ARM: imx: rename imx6q_set_int_mem_clk_lpm() function 2016-08-29 22:39:27 +08:00
cpuidle-imx6sl.c ARM: imx6: set initial power mode in pm function 2015-06-03 14:44:31 +08:00
cpuidle-imx6sx.c ARM: imx: add cpuidle support for i.mx6ul 2016-08-29 22:39:28 +08:00
cpuidle.h ARM: imx: support arm power off in cpuidle for i.mx6sx 2015-01-05 21:34:29 +08:00
crmregs-imx3.h
devices-imx21.h ARM: imx: move platform device code into mach-imx 2012-10-15 09:18:15 +08:00
devices-imx27.h ARM : i.MX27 : split code for allocation of ressources of camera and eMMA 2012-11-16 16:21:48 +01:00
devices-imx31.h ARM: imx: move platform device code into mach-imx 2012-10-15 09:18:15 +08:00
devices-imx35.h ARM: imx: prepare for removal of flexcan_platform_data 2013-06-27 15:15:08 +02:00
ehci-imx27.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
ehci-imx31.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
ehci-imx35.c ARM: imx: move EHCI platform defines out of platform_data header 2014-07-18 16:10:04 +08:00
ehci.h ARM: imx5: remove imx51 non-DT support files 2014-07-18 16:10:05 +08:00
epit.c ARM: imx: use endian-safe readl/readw/writel/writew 2016-02-02 13:24:17 +08:00
gpc.c ARM: imx: gpc: Fix the imx_gpc_genpd_init() error path 2016-10-24 15:13:02 +08:00
hardware.h ARM: imx: (trivial) fix typo and grammar 2016-09-05 10:36:19 +08:00
headsmp.S ARM: imx: enable big endian mode 2016-02-02 13:31:19 +08:00
hotplug.c ARM: imx: do not return from imx_cpu_die() call 2013-10-21 09:37:31 +08:00
iim.h ARM: imx: include iim.h rather than mach/iim.h 2012-10-15 10:03:10 +08:00
imx27-dt.c ARM: imx: rework mx27_pm_init() call 2016-06-28 10:26:40 +08:00
imx31-dt.c ARM: imx: deconstruct mxc_rnga initialization 2016-06-28 10:26:34 +08:00
imx35-dt.c ARM: i.MX: Do not explicitly call l2x0_of_init() 2016-06-21 20:40:47 +08:00
iomux-imx31.c ARM: imx: use endian-safe readl/readw/writel/writew 2016-02-02 13:24:17 +08:00
iomux-mx2x.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-mx3.h ARM: i.MX31 iomux: remove duplicates with alternate name 2016-08-08 21:41:17 +08:00
iomux-mx21.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-mx27.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-mx35.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-v1.c ARM: imx: use endian-safe readl/readw/writel/writew 2016-02-02 13:24:17 +08:00
iomux-v1.h ARM: imx: move iomux drivers and headers into mach-imx 2012-10-15 09:18:14 +08:00
iomux-v3.c ARM: imx: use endian-safe readl/readw/writel/writew 2016-02-02 13:24:17 +08:00
iomux-v3.h ARM: imx: Fix trivial typo in comments 2015-03-03 12:05:46 +08:00
irq-common.c ARM: i.MX: Fix FIQ interrupt handling for TZIC 2016-06-21 15:57:05 +08:00
irq-common.h ARM: imx: drop support for irq priorisation 2013-12-09 13:18:25 +08:00
Kconfig ARM: select PCI_DOMAINS config from ARCH_MULTIPLATFORM 2016-09-21 22:45:13 +02:00
mach-armadillo5x0.c ARM: imx legacy: armadillo5x0: move peripheral initialization to .init_late 2016-09-20 22:35:08 +08:00
mach-bug.c ARM: i.MX: Setup IRQ handler from IRQ driver 2014-05-12 22:58:51 +08:00
mach-imx1.c ARM: i.MX: Move SOC_IMX1 into 'Device tree only' 2016-08-09 22:47:29 +08:00
mach-imx6q.c ARM: SoC platform updates for v4.8 2016-08-01 18:27:08 -04:00
mach-imx6sl.c ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-imx6sx.c ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-imx6ul.c ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
mach-imx7d.c ARM: SoC platform updates for v4.8 2016-08-01 18:27:08 -04:00
mach-imx25.c ARM: mx25: Add basic suspend/resume support 2016-02-14 11:24:18 +08:00
mach-imx27_visstrim_m10.c ARM: imx legacy: imx27-visstrim-m10: move peripheral initialization to .init_late 2016-09-20 22:35:17 +08:00
mach-imx50.c ARM: imx: Use IRQCHIP_DECLARE for TZIC 2016-06-12 19:47:18 +08:00
mach-imx51.c ARM: SoC platform updates for v4.8 2016-08-01 18:27:08 -04:00
mach-imx53.c ARM: SoC cleanups for v4.8 2016-08-01 18:21:13 -04:00
mach-kzm_arm11_01.c ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
mach-ls1021a.c ARM: imx: Add Freescale LS1021A SMP support 2014-11-23 14:56:21 +08:00
mach-mx21ads.c ARM: imx legacy: mx21ads: move peripheral initialization to .init_late 2016-09-20 22:39:06 +08:00
mach-mx27_3ds.c ARM: imx legacy: mx27-3ds: move peripheral initialization to .init_late 2016-09-20 22:35:20 +08:00
mach-mx27ads.c ARM: imx legacy: mx27ads: move peripheral initialization to .init_late 2016-09-20 22:39:07 +08:00
mach-mx31_3ds.c ARM: imx legacy: mx31-3ds: move peripheral initialization to .init_late 2016-09-20 22:35:00 +08:00
mach-mx31ads.c ARM: imx legacy: mx31ads: move peripheral initialization to .init_late 2016-09-20 22:34:51 +08:00
mach-mx31lilly.c ARM: imx legacy: mx31lilly: move peripheral initialization to .init_late 2016-09-20 22:34:54 +08:00
mach-mx31lite.c ARM: imx legacy: mx31lite: move peripheral initialization to .init_late 2016-09-20 22:34:47 +08:00
mach-mx31moboard.c ARM: imx legacy: mx31moboard: move peripheral initialization to .init_late 2016-09-20 22:35:11 +08:00
mach-mx35_3ds.c ARM: imx legacy: mx35-3ds: move peripheral initialization to .init_late 2016-09-20 22:35:23 +08:00
mach-pca100.c ARM: imx legacy: pca100: move peripheral initialization to .init_late 2016-09-20 22:39:07 +08:00
mach-pcm037_eet.c ARM: imx: include common.h rather than mach/common.h 2012-10-15 10:03:10 +08:00
mach-pcm037.c ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
mach-pcm043.c ARM: imx legacy: pcm043: move peripheral initialization to .init_late 2016-09-20 22:39:06 +08:00
mach-qong.c ARM: imx legacy: qong: move peripheral initialization to .init_late 2016-09-20 22:35:04 +08:00
mach-vf610.c ARM: vf610: enable Cortex-M4 configuration on Vybrid SoC 2015-05-20 23:10:14 +02:00
mach-vpr200.c ARM: imx legacy: vpr200: move peripheral initialization to .init_late 2016-09-20 22:35:14 +08:00
Makefile Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild 2016-10-14 14:26:58 -07:00
Makefile.boot ARM: vf610: enable Cortex-M4 configuration on Vybrid SoC 2015-05-20 23:10:14 +02:00
mm-imx3.c ARM: imx: deconstruct mx3_idle 2016-06-28 10:26:37 +08:00
mm-imx21.c ARM: imx: move clk_prepare() out from mxc_restart() 2013-06-17 15:45:10 +08:00
mm-imx27.c ARM: imx: rework mx27_pm_init() call 2016-06-28 10:26:40 +08:00
mmdc.c ARM: imx: mmdc: Include "common.h" header file 2015-06-03 14:49:34 +08:00
mx2x.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mx3x.h ARM: imx: move revision definitions and declarations into a header 2015-06-03 14:44:30 +08:00
mx21.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mx27.h ARM: imx: move revision definitions and declarations into a header 2015-06-03 14:44:30 +08:00
mx31.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mx31lilly-db.c ARM: imx legacy: mx31lilly: move peripheral initialization to .init_late 2016-09-20 22:34:54 +08:00
mx31lite-db.c ARM: imx legacy: mx31lite: move peripheral initialization to .init_late 2016-09-20 22:34:47 +08:00
mx31moboard-devboard.c ARM: imx: use PTR_ERR_OR_ZERO 2014-07-18 16:11:36 +08:00
mx31moboard-marxbot.c ARM: imx: use PTR_ERR_OR_ZERO 2014-07-18 16:11:36 +08:00
mx31moboard-smartbot.c ARM: imx: use PTR_ERR_OR_ZERO 2014-07-18 16:11:36 +08:00
mx35.h ARM: imx: include hardware.h rather than mach/hardware.h 2012-10-15 10:05:43 +08:00
mxc.h ARM: imx: remove cpu_is_mx*() 2016-06-28 10:26:45 +08:00
pcm037.h
platsmp.c ARM: use const and __initconst for smp_operations 2015-12-01 22:17:45 +01:00
pm-imx5.c ARM: imx: use endian-safe readl/readw/writel/writew 2016-02-02 13:24:17 +08:00
pm-imx6.c ARM: SoC platform updates for v4.9 2016-10-07 21:18:42 -07:00
pm-imx25.c ARM: mx25: Add basic suspend/resume support 2016-02-14 11:24:18 +08:00
pm-imx27.c ARM: imx: rework mx27_pm_init() call 2016-06-28 10:26:40 +08:00
src.c ARM: imx: Make reset_control_ops const 2016-02-29 10:37:44 +08:00
ssi-fiq.S arm: move exports to definitions 2016-08-07 23:47:21 -04:00
suspend-imx6.S ARM: imx: add suspend/resume support for i.mx6ul 2015-09-17 08:54:35 +08:00
suspend-imx53.S ARM: imx53: Set DDR pins to high impedance when in suspend to RAM. 2015-06-03 14:49:36 +08:00
system.c ARM: imx: remove cpu_is_mx1 check 2016-06-28 10:26:20 +08:00
tzic.c ARM: SoC platform updates for v4.8 2016-08-01 18:27:08 -04:00
ulpi.h ARM: imx: Remove mxc specific ulpi access ops 2013-06-17 15:45:16 +08:00