ARM: SAMSUNG: Gracefully exit on suspend failure
As per the Exynos5250 User Manual:
When there are pending interrupt events, WFI/WFE instruction are
ignored. To cancel the power-down sequence follow these steps:
1) Disable system power-down using CENTRAL_SEQ_CONFIGURATION register
2) Clear WAKEUP_STAT register
3) Enable interrupt service routine for CPU
Code for early wakeup for exynos already exists. Remove the panic
on suspend failure, clear the wakeup state register and return 1
from cpu_suspend to indicate a failed suspend (to a user daemon).
Older Samsung SoCs have similar panics and I have removed them all.
Haven't touched the S3C2410 sleep code.
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/mach-s3c24xx/pm-s3c2412.c b/arch/arm/mach-s3c24xx/pm-s3c2412.c
index c60f67a..f5dc2b2 100644
--- a/arch/arm/mach-s3c24xx/pm-s3c2412.c
+++ b/arch/arm/mach-s3c24xx/pm-s3c2412.c
@@ -48,7 +48,8 @@
s3c2412_sleep_enter();
- panic("sleep resumed to originator?");
+ pr_info("Failed to suspend the system\n");
+ return 1; /* Aborting suspend */
}
static void s3c2412_pm_prepare(void)