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authorAlan Stern <stern@rowland.harvard.edu>2007-07-06 14:24:27 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-07-12 16:34:43 -0700
commit8dfe4b14869fd185ca25ee88b02ada58a3005eaf (patch)
tree0c0c8812f1d038706bd82ff0d7b3570d67645e68 /drivers/usb/storage/scsiglue.c
parentb0e2a705bffbfb70d9bed8b5f9094901f28d9563 (diff)
usb-storage: implement autosuspend
This patch (as930) implements autosuspend for usb-storage. It is adapted from a patch by Oliver Neukum. Autosuspend is allowed except during LUN scanning, resets, and command execution. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/storage/scsiglue.c')
-rw-r--r--drivers/usb/storage/scsiglue.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 1ba19eaa197..47e56079925 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -285,10 +285,15 @@ static int device_reset(struct scsi_cmnd *srb)
US_DEBUGP("%s called\n", __FUNCTION__);
- /* lock the device pointers and do the reset */
- mutex_lock(&(us->dev_mutex));
- result = us->transport_reset(us);
- mutex_unlock(&us->dev_mutex);
+ result = usb_autopm_get_interface(us->pusb_intf);
+ if (result == 0) {
+
+ /* lock the device pointers and do the reset */
+ mutex_lock(&(us->dev_mutex));
+ result = us->transport_reset(us);
+ mutex_unlock(&us->dev_mutex);
+ usb_autopm_put_interface(us->pusb_intf);
+ }
return result < 0 ? FAILED : SUCCESS;
}