AcoSail/kernel_optimize_test
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PM: suspend: Fix platform_suspend_prepare_noirq()

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After commit ac9eafbe93 ("ACPI: PM: s2idle: Execute LPS0 _DSM
functions with suspended devices"), a NULL pointer may be dereferenced
if suspend-to-idle is attempted on a platform without "traditional"
suspend support due to invalid fall-through in
platform_suspend_prepare_noirq().

Fix that and while at it add missing braces in platform_resume_noirq().

Fixes: ac9eafbe93 ("ACPI: PM: s2idle: Execute LPS0 _DSM functions with suspended devices")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2019-08-10 13:18:06 +02:00
parent d19bdb876b
commit 11f26633cc
1 changed files with 6 additions and 5 deletions
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11
kernel/power/suspend.c
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@ -253,10 +253,10 @@ static int platform_suspend_prepare_late(suspend_state_t state)
static int platform_suspend_prepare_noirq(suspend_state_t state)
{
if (state == PM_SUSPEND_TO_IDLE) {
if (s2idle_ops && s2idle_ops->prepare_late)
return s2idle_ops->prepare_late();
}
if (state == PM_SUSPEND_TO_IDLE)
return s2idle_ops && s2idle_ops->prepare_late ?
s2idle_ops->prepare_late() : 0;
return suspend_ops->prepare_late ? suspend_ops->prepare_late() : 0;
}
@ -265,8 +265,9 @@ static void platform_resume_noirq(suspend_state_t state)
if (state == PM_SUSPEND_TO_IDLE) {
if (s2idle_ops && s2idle_ops->restore_early)
s2idle_ops->restore_early();
} else if (suspend_ops->wake)
} else if (suspend_ops->wake) {
suspend_ops->wake();
}
}
static void platform_resume_early(suspend_state_t state)