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authorSantosh Shilimkar <santosh.shilimkar@ti.com>2014-05-13 01:37:59 +0400
committerTony Lindgren <tony@atomide.com>2014-05-19 22:20:38 +0400
commit4b353a706a86598ba47307c47301c3c428b79e09 (patch)
tree85f4ef52c2d983c61a850c6676c3d4ed05174efe /arch/arm/common/edma.c
parent9ce2482fc6b22709df087d4a8387b67893176312 (diff)
downloadlinux-4b353a706a86598ba47307c47301c3c428b79e09.tar.xz
ARM: OMAP4: Fix the boot regression with CPU_IDLE enabled
On OMAP4 panda board, there have been several bug reports about boot hang and lock-ups with CPU_IDLE enabled. The root cause of the issue is missing interrupts while in idle state. Commit cb7094e8 {cpuidle / omap4 : use CPUIDLE_FLAG_TIMER_STOP flag} moved the broadcast notifiers to common code for right reasons but on OMAP4 which suffers from a nasty ROM code bug with GIC, commit ff999b8a {ARM: OMAP4460: Workaround for ROM bug ..}, we loose interrupts which leads to issues like lock-up, hangs etc. Patch reverts commit cb7094 {cpuidle / omap4 : use CPUIDLE_FLAG_TIMER_STOP flag} and 54769d6 {cpuidle: OMAP4: remove timer broadcast initialization} to avoid the issue. With this change, OMAP4 panda boards, the mentioned issues are getting fixed. We no longer loose interrupts which was the cause of the regression. Fixes: cb7094e8 (cpuidle / omap4 : use CPUIDLE_FLAG_TIMER_STOP flag) Fixes: ff999b8a (cpuidle: OMAP4: remove timer broadcast initialization) Cc: stable@vger.kernel.org # v3.9+ Cc: Roger Quadros <rogerq@ti.com> Cc: Kevin Hilman <khilman@linaro.org> Cc: Tony Lindgren <tony@atomide.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Reported-tested-by: Roger Quadros <rogerq@ti.com> Reported-tested-by: Kevin Hilman <khilman@linaro.org> Tested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
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