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| author | Alan Stern <[email protected]> | 2010-01-08 17:57:02 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2010-03-02 22:54:11 +0000 |
| commit | 5899f1e020c8d53b2b6fbd6a6cf39c891ccdfade (patch) | |
| tree | acd9041996aa81db4bdc9a30fe1926e511d7eb77 /drivers/usb/core/usb.c | |
| parent | USB: implement usb_enable_autosuspend (diff) | |
| download | kernel-5899f1e020c8d53b2b6fbd6a6cf39c891ccdfade.tar.gz kernel-5899f1e020c8d53b2b6fbd6a6cf39c891ccdfade.zip | |
USB: change handling of negative autosuspend delays
This patch (as1327) changes the way negative autosuspend delays
prevent device from autosuspending. The current code checks for
negative values explicitly in the autosuspend_check() routine. The
updated code keeps things from getting that far by using
usb_autoresume_device() to increment the usage counter when a negative
delay is set, and by using usb_autosuspend_device() to decrement the
usage counter when a non-negative delay is set.
This complicates the set_autosuspend() attribute method code slightly,
but it will reduce the overall power management overhead.
Signed-off-by: Alan Stern <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'drivers/usb/core/usb.c')
0 files changed, 0 insertions, 0 deletions