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[PATCH] introduce .valid callback for pm_ops

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Add pm_ops.valid callback, so only the available pm states show in
/sys/power/state.  And this also makes an earlier states error report at
enter_state before we do actual suspend/resume.

Signed-off-by: Shaohua Li<shaohua.li@intel.com>
Acked-by: Pavel Machek<pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Shaohua Li 2005-10-30 15:00:01 -08:00 • committed by Linus Torvalds
parent 0245b3e787
commit eb9289eb20
3 changed files with 13 additions and 1 deletions
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1
include/linux/pm.h
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@ -170,6 +170,7 @@ typedef int __bitwise suspend_disk_method_t;
struct pm_ops {
suspend_disk_method_t pm_disk_mode;
int (*valid)(suspend_state_t state);
int (*prepare)(suspend_state_t state);
int (*enter)(suspend_state_t state);
int (*finish)(suspend_state_t state);