PM / Runtime: Use deferred_resume flag in pm_request_resume
This patch (as1307) adds a small optimization to __pm_request_resume(). If the device is currently being suspended, there's no need to queue a work routine to resume it. Setting the deferred_resume flag will suffice. (There's also a minor improvement to the function's code layout: An unnecessary "else" is removed.) Also, the patch clarifies the usage of the deferred_resume flag. It is meaningful only while a suspend is in progress, so it should be cleared just before a suspend starts, not just after one ends. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
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