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f5c33b070d
linux/arch/arm
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Nishanth Menon f5c33b070d ARM: OMAP2+: omap_device: add fail hook for runtime_pm when bad data is detected 
Due to the cross dependencies between hwmod for automanaged device
information for OMAP and dts node definitions, we can run into scenarios
where the dts node is defined, however it's hwmod entry is yet to be
added. In these cases:
a) omap_device does not register a pm_domain (since it cannot find
   hwmod entry).
b) driver does not know about (a), does a pm_runtime_get_sync which
   never fails
c) It then tries to do some operation on the device (such as read the
  revision register (as part of probe) without clock or adequate OMAP
  generic PM operation performed for enabling the module.

This causes a crash such as that reported in:
https://bugzilla.kernel.org/show_bug.cgi?id=66441

When 'ti,hwmod' is provided in dt node, it is expected that the device
will not function without the OMAP's power automanagement. Hence, when
we hit a fail condition (due to hwmod entries not present or other
similar scenario), fail at pm_domain level due to lack of data, provide
enough information for it to be fixed, however, it allows for the driver
to take appropriate measures to prevent crash.

Reported-by: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Signed-off-by: Nishanth Menon <nm@ti.com>
Acked-by: Kevin Hilman <khilman@linaro.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kevin Hilman <khilman@linaro.org>
2013-12-10 09:39:52 -08:00
..
boot ARM: dts: Fix booting for secure omaps 2013-12-06 15:30:43 -08:00
common Merge branch 'next' of git://git.infradead.org/users/vkoul/slave-dma 2013-11-20 13:20:24 -08:00
configs ARM: multi_v7_defconfig: enable SDHCI_BCM_KONA and MMC_BLOCK_MINORS=16 2013-12-03 12:39:14 -08:00
crypto ARM: add .gitignore entry for aesbs-core.S 2013-10-07 15:43:53 +01:00
include ARM: fix booting low-vectors machines 2013-11-30 14:45:31 +00:00
kernel ARM: 7897/1: kexec: Use the right ISA for relocate_new_kernel 2013-11-30 22:21:02 +00:00
kvm Fix percpu vmalloc allocations 2013-11-19 10:43:05 +02:00
lib ARM: 7907/1: lib: delay-loop: Add align directive to fix BogoMIPS calculation 2013-11-30 22:21:03 +00:00
mach-at91 ARM: SoC fixes for 3.13-rc 2013-12-04 08:56:18 -08:00
mach-bcm BCM changes for 3.13/soc. A number of cleanup related changes. 2013-10-30 14:03:39 -07:00
mach-bcm2835 Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-12 10:02:59 +09:00
mach-clps711x ARM: clps711x: Use linux/sched_clock.h 2013-10-11 14:50:10 -07:00
mach-cns3xxx
mach-davinci This pull request includes a patch 2013-12-04 14:28:26 -08:00
mach-dove ARM: driver updates for 3.13 2013-11-11 17:05:37 +09:00
mach-ebsa110
mach-ep93xx usb: ohci: remove ep93xx bus glue platform driver 2013-10-29 16:43:37 -07:00
mach-exynos ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
mach-footbridge ARM: footbridge: fix EBSA285 LEDs 2013-11-30 22:20:59 +00:00
mach-gemini GPIO bulk changes for the v3.13 development cycle 2013-11-12 15:50:46 +09:00
mach-highbank ARM: highbank: handle soft poweroff and reset key events 2013-12-04 09:28:50 -08:00
mach-imx Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-11-18 15:50:07 -08:00
mach-integrator Few clock fixes, a runtime PM fix, and pinctrl-single fix along 2013-11-15 15:17:59 -08:00
mach-iop13xx dmaengine: remove DMA unmap from drivers 2013-11-14 11:04:38 -08:00
mach-iop32x ARM: plat-iop: pass physical base for GPIO 2013-09-20 23:05:19 +02:00
mach-iop33x ARM: plat-iop: pass physical base for GPIO 2013-09-20 23:05:19 +02:00
mach-ixp4xx Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 08:51:29 +09:00
mach-keystone DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
mach-kirkwood Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-11-18 15:50:07 -08:00
mach-ks8695
mach-lpc32xx
mach-mmp fbdev changes for 3.13 2013-11-14 14:44:20 +09:00
mach-msm Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-12 10:36:00 +09:00
mach-mv78xx0
mach-mvebu ARM: mvebu: support running big-endian 2013-10-19 20:46:34 +01:00
mach-mxs ARM: SoC DT updates for 3.13 2013-11-11 17:34:56 +09:00
mach-netx
mach-nomadik Merge branch 'clk-of-init-v2_for-3.13' of https://github.com/shesselba/linux-dove into next/cleanup 2013-10-07 09:47:31 -07:00
mach-nspire ARM: nspire: remove custom .init_time hook 2013-09-29 21:09:37 +02:00
mach-omap1 Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-11-18 15:50:07 -08:00
mach-omap2 ARM: OMAP2+: omap_device: add fail hook for runtime_pm when bad data is detected 2013-12-10 09:39:52 -08:00
mach-orion5x
mach-picoxcell
mach-prima2 ARM: prima2: remove custom .init_time hook 2013-09-29 21:09:38 +02:00
mach-pxa Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-11-18 15:50:07 -08:00
mach-realview
mach-rockchip ARM: SoC board updates for 3.13 2013-11-11 16:57:16 +09:00
mach-rpc
mach-s3c24xx Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2013-11-18 15:50:07 -08:00
mach-s3c64xx pwm: Changes for v3.13-rc1 2013-11-16 12:21:40 -08:00
mach-s5p64x0 ARM: SAMSUNG: Initialize PWM backlight enable_gpio field 2013-10-16 09:05:57 +02:00
mach-s5pc100 ARM: SAMSUNG: Initialize PWM backlight enable_gpio field 2013-10-16 09:05:57 +02:00
mach-s5pv210 pwm: Changes for v3.13-rc1 2013-11-16 12:21:40 -08:00
mach-sa1100 ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
mach-shmobile pwm: Changes for v3.13-rc1 2013-11-16 12:21:40 -08:00
mach-socfpga arm: socfpga: Enable ARM_TWD for socfpga 2013-12-03 14:19:48 -08:00
mach-spear ARM: drop explicit selection of HAVE_CLK and CLKDEV_LOOKUP 2013-10-07 10:41:32 -07:00
mach-sti ARM: SoC fixes for 3.13 merge window 2013-11-16 12:45:55 -08:00
mach-sunxi ARM: sunxi: remove .init_time hooks 2013-10-28 10:19:45 -07:00
mach-tegra Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2013-11-23 16:18:25 -08:00
mach-u300 DeviceTree updates for 3.13. This is a bit larger pull request than 2013-11-12 16:52:17 +09:00
mach-ux500 Revert "ARM: ux500: Stop passing MMC's platform data for Device Tree boots" 2013-11-26 21:02:20 +01:00
mach-versatile
mach-vexpress ARM: vexpress/TC2: Implement MCPM power_down_finish() 2013-11-25 14:12:14 -08:00
mach-virt
mach-vt8500 ARM: drop explicit selection of HAVE_CLK and CLKDEV_LOOKUP 2013-10-07 10:41:32 -07:00
mach-w90x900 ARM: w90x900: delete <mach/gpio.h> 2013-10-01 10:33:02 +02:00
mach-zynq ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
mm ARM: fix booting low-vectors machines 2013-11-30 14:45:31 +00:00
net Merge branch 'devel-stable' into for-next 2013-11-12 10:58:59 +00:00
nwfpe
oprofile
plat-iop ARM: plat-iop: move the GPIO driver to drivers/gpio 2013-09-20 23:03:36 +02:00
plat-omap ARM: OMAP2+: Disable POSTED mode for errata i103 and i767 2013-11-26 15:03:36 -08:00
plat-orion
plat-pxa
plat-samsung pwm: Changes for v3.13-rc1 2013-11-16 12:21:40 -08:00
plat-versatile ARM: vexpress: add big endian support 2013-10-19 20:46:34 +01:00
tools
vfp ARM: 7873/1: vfp: clear vfp_current_hw_state for dying cpu 2013-10-30 22:10:10 +00:00
xen xen/arm: p2m_init and p2m_lock should be static 2013-11-18 15:33:10 +00:00
Kconfig Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm 2013-11-22 09:56:51 -08:00
Kconfig-nommu
Kconfig.debug Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 08:51:29 +09:00
Makefile Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm 2013-11-14 08:51:29 +09:00