tree 658a52b671d92b75db90153a832434c82504a4f7
parent 5611cc4572e889b62a7b4c72a413536bf6a9c416
author Sarah Sharp <sarah.a.sharp@linux.intel.com> 1322855744 -0800
committer Sebastian Andrzej Siewior <bigeasy@linutronix.de> 1324545174 +0100

UAS: Re-add workqueue items if submission fails.

If the original submission (or allocation) of the URBs for a SCSI
command fails, the UAS driver sticks the command structure in a
workqueue and schedules uas_do_work() to run.  That function removes the
entire queue before walking across it and attempting to resubmit.

Unfortunately, if the second submission fails, we will leak memory
(because an allocated URB was not submitted) and possibly leave the SCSI
command partially enqueued on some of the stream rings.  Fix this by
checking whether the second submission failed and re-queueing the
command to the UAS workqueue and scheduling it.

Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>