tree 6d3860193ac4eba815623aebaf342161542d4e62
parent 2fde0e482db2b43bb4ed0e9aebfbe78ebcbbf5a6
author Keith Busch <keith.busch@intel.com> 1448033893 -0700
committer Jens Axboe <axboe@fb.com> 1448033893 -0700

NVMe: reap completion entries when deleting queue

Make sure that there are no unprocesssed entries on a completion
queue before deleting it, and check for validity of the CQ
door bell before writing completions to it.

This fixes problems with doing a sysfs reset of the device while
it's handling IO.

Tested-by: Jon Derrick <jonathan.derrick@intel.com>

Signed-off-by: Jens Axboe <axboe@fb.com>