Fix entering suspend-to-IDLE if no freeze_oops is set

If no freeze_ops is set, trying to enter suspend-to-IDLE will cause a nice oops in platform_suspend_prepare_late(). Add respective checks to platform_suspend_prepare_late() and platform_resume_early() functions.

Fixes a8d46b9e (ACPI / sleep: Rework the handling of ACPI GPE wakeup ...)

Signed-off-by Dmitry Eremin-Solenikov <[email protected]>

---
 kernel/power/suspend.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

kernel/power/suspend.c +2 -2

index 4ca9a33..c347e3c 100644
@@ -146,7 +146,7 @@ static int platform_suspend_prepare(suspend_state_t state)
 
 static int platform_suspend_prepare_late(suspend_state_t state)
 {
-	return state == PM_SUSPEND_FREEZE && freeze_ops->prepare ?
+	return state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->prepare ?
 		freeze_ops->prepare() : 0;
 }
 

@@ -164,7 +164,7 @@ static void platform_resume_noirq(suspend_state_t state)
 
 static void platform_resume_early(suspend_state_t state)
 {
-	if (state == PM_SUSPEND_FREEZE && freeze_ops->restore)
+	if (state == PM_SUSPEND_FREEZE && freeze_ops && freeze_ops->restore)
 		freeze_ops->restore();
 }