From 29cb3cd208dd0e4471bb80bec4facc49ceb199fa Mon Sep 17 00:00:00 2001 From: Russell King Date: Sat, 2 Jul 2011 09:54:01 +0100 Subject: ARM: pm: allow suspend finisher to return error codes There are SoCs where attempting to enter a low power state is ignored, and the CPU continues executing instructions with all state preserved. It is over-complex at that point to disable the MMU just to call the resume path. Instead, allow the suspend finisher to return error codes to abort suspend in this circumstance, where the cpu_suspend internals will then unwind the saved state on the stack. Also omit the tlb flush as no changes to the page tables will have happened. Signed-off-by: Russell King --- arch/arm/mach-s3c2416/pm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/arm/mach-s3c2416/pm.c') diff --git a/arch/arm/mach-s3c2416/pm.c b/arch/arm/mach-s3c2416/pm.c index 9e67a2a07a86..9ec54f1d8e75 100644 --- a/arch/arm/mach-s3c2416/pm.c +++ b/arch/arm/mach-s3c2416/pm.c @@ -24,7 +24,7 @@ extern void s3c2412_sleep_enter(void); -static void s3c2416_cpu_suspend(unsigned long arg) +static int s3c2416_cpu_suspend(unsigned long arg) { /* enable wakeup sources regardless of battery state */ __raw_writel(S3C2443_PWRCFG_SLEEP, S3C2443_PWRCFG); @@ -33,6 +33,8 @@ static void s3c2416_cpu_suspend(unsigned long arg) __raw_writel(0x2BED, S3C2443_PWRMODE); s3c2412_sleep_enter(); + + panic("sleep resumed to originator?"); } static void s3c2416_pm_prepare(void) -- cgit v1.2.3