From 9684e51cd157607f0727c1550e7df6e31de40808 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Mon, 30 Apr 2007 15:09:55 -0700 Subject: power management: force pm_ops.valid callback to be assigned This patch changes the docs and behaviour from "all states valid" to "no states valid" if no .valid callback is assigned. Users of pm_ops that only need mem sleep can assign pm_valid_only_mem without any overhead, others will require more elaborate callbacks. Now that all users of pm_ops have a .valid callback this is a safe thing to do and prevents things from getting messy again as they were before. Signed-off-by: Johannes Berg Acked-by: Pavel Machek Looks-okay-to: Rafael J. Wysocki Cc: Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/pm.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'include/linux') diff --git a/include/linux/pm.h b/include/linux/pm.h index 6035209cf31..7a516690dcb 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -125,12 +125,12 @@ typedef int __bitwise suspend_disk_method_t; * struct pm_ops - Callbacks for managing platform dependent suspend states. * @valid: Callback to determine whether the given state can be entered. * If %CONFIG_SOFTWARE_SUSPEND is set then %PM_SUSPEND_DISK is - * always valid and never passed to this call. - * If not assigned, all suspend states are advertised as valid - * in /sys/power/state (but can still be rejected by prepare or enter.) - * Since new states can be added for other platforms, you should - * assign this callback. There is a %pm_valid_only_mem function - * available if you only implemented mem sleep. + * always valid and never passed to this call. If not assigned, + * no suspend states are valid. + * Valid states are advertised in /sys/power/state but can still + * be rejected by prepare or enter if the conditions aren't right. + * There is a %pm_valid_only_mem function available that can be assigned + * to this if you only implement mem sleep. * * @prepare: Prepare the platform for the given suspend state. Can return a * negative error code if necessary. -- cgit v1.2.3-70-g09d2