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 <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/plat-samsung/include/plat/pm.h b/arch/arm/plat-samsung/include/plat/pm.h
index 0a5b7fa..f674991 100644
--- a/arch/arm/plat-samsung/include/plat/pm.h
+++ b/arch/arm/plat-samsung/include/plat/pm.h
@@ -42,7 +42,7 @@
/* per-cpu sleep functions */
extern void (*pm_cpu_prep)(void);
-extern void (*pm_cpu_sleep)(unsigned long);
+extern int (*pm_cpu_sleep)(unsigned long);
/* Flags for PM Control */
@@ -54,7 +54,7 @@
extern void s3c_cpu_resume(void);
-extern void s3c2410_cpu_suspend(unsigned long);
+extern int s3c2410_cpu_suspend(unsigned long);
/* sleep save info */