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authorRafael J. Wysocki <rjw@sisk.pl>2008-10-15 22:01:21 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-16 11:21:29 -0700
commit1bfcf1304ea79c46efc3724e548b13b4b442b418 (patch)
tree5adbf95b25d1d9e86fc0e5d0784550ccb9bf5be9 /Documentation
parent574f34cee2b6574d43bf4506f771c1cec6a5d391 (diff)
pm: rework disabling of user mode helpers during suspend/hibernation
We currently use a PM notifier to disable user mode helpers before suspend and hibernation and to re-enable them during resume. However, this is not an ideal solution, because if any drivers want to upload firmware into memory before suspend, they have to use a PM notifier for this purpose and there is no guarantee that the ordering of PM notifiers will be as expected (ie. the notifier that disables user mode helpers has to be run after the driver's notifier used for uploading the firmware). For this reason, it seems better to move the disabling and enabling of user mode helpers to separate functions that will be called by the PM core as necessary. [akpm@linux-foundation.org: remove unneeded ifdefs] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Alan Stern <stern@rowland.harvard.edu> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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