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ACPI: PM: sleep: Do not set suspend_ops unnecessarily 

If none of the S1 - S3 sleep states is supported, it is not necessary
to register suspend_ops, so don't do that then.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2021-10-20 21:10:17 +02:00
parent a9a8f827f9
commit d69d1f7080
1 changed files with 7 additions and 3 deletions
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10
drivers/acpi/sleep.c
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@ -815,14 +815,18 @@ void __weak acpi_s2idle_setup(void)
static void acpi_sleep_suspend_setup(void) static void acpi_sleep_suspend_setup(void)
{ {
bool suspend_ops_needed = false;
int i; int i;
for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++) for (i = ACPI_STATE_S1; i < ACPI_STATE_S4; i++)
if (acpi_sleep_state_supported(i)) if (acpi_sleep_state_supported(i)) {
sleep_states[i] = 1; sleep_states[i] = 1;
suspend_ops_needed = true;
}
suspend_set_ops(old_suspend_ordering ? if (suspend_ops_needed)
&acpi_suspend_ops_old : &acpi_suspend_ops); suspend_set_ops(old_suspend_ordering ?
&acpi_suspend_ops_old : &acpi_suspend_ops);
acpi_s2idle_setup(); acpi_s2idle_setup();
} }