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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-10-22 17:53:43 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2021-10-26 15:52:58 +0200
commit9f6abfcd67aae51374b4e8aa0b11f0ebd0d8562f (patch)
tree8ecb86974b41d863bc96629eaab3085b2156d154 /kernel/power
parentPM: sleep: Pause cpuidle later and resume it earlier during system transitions (diff)
downloadlinux-9f6abfcd67aae51374b4e8aa0b11f0ebd0d8562f.tar.xz
linux-9f6abfcd67aae51374b4e8aa0b11f0ebd0d8562f.zip
PM: suspend: Use valid_state() consistently
Make valid_state() check if the ->enter callback is present in suspend_ops (only PM_SUSPEND_TO_IDLE can be valid otherwise) and make sleep_state_supported() call valid_state() consistently to validate the states other than PM_SUSPEND_TO_IDLE. While at it, clean up the comment in valid_state(). No expected functional impact. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'kernel/power')
-rw-r--r--kernel/power/suspend.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 8bea835ef1fa..80cc1f0f502b 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -160,11 +160,13 @@ EXPORT_SYMBOL_GPL(s2idle_wake);
static bool valid_state(suspend_state_t state)
{
/*
- * PM_SUSPEND_STANDBY and PM_SUSPEND_MEM states need low level
- * support and need to be valid to the low level
- * implementation, no valid callback implies that none are valid.
+ * The PM_SUSPEND_STANDBY and PM_SUSPEND_MEM states require low-level
+ * support and need to be valid to the low-level implementation.
+ *
+ * No ->valid() or ->enter() callback implies that none are valid.
*/
- return suspend_ops && suspend_ops->valid && suspend_ops->valid(state);
+ return suspend_ops && suspend_ops->valid && suspend_ops->valid(state) &&
+ suspend_ops->enter;
}
void __init pm_states_init(void)
@@ -236,7 +238,7 @@ EXPORT_SYMBOL_GPL(suspend_valid_only_mem);
static bool sleep_state_supported(suspend_state_t state)
{
- return state == PM_SUSPEND_TO_IDLE || (suspend_ops && suspend_ops->enter);
+ return state == PM_SUSPEND_TO_IDLE || valid_state(state);
}
static int platform_suspend_prepare(suspend_state_t state)