[PATCH] PM: suspend: Use valid_state() consistently
From: Rafael J. Wysocki <hidden>
Date: 2021-10-22 15:53:50
Also in:
lkml
From: Rafael J. Wysocki <redacted> 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 <redacted> --- kernel/power/suspend.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) Index: linux-pm/kernel/power/suspend.c ===================================================================
--- linux-pm.orig/kernel/power/suspend.c
+++ linux-pm/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)