tree 539842ad23a4eaae8c272278fd9fea389afa6b93
parent 52addcf9d6669fa439387610bc65c92fa0980cef
author Joe Lawrence <joe.lawrence@stratus.com> 1404329716 -0400
committer Jens Axboe <axboe@fb.com> 1409088023 -0600

block,scsi: verify return pointer from blk_get_request

The blk-core dead queue checks introduce an error scenario to
blk_get_request that returns NULL if the request queue has been
shutdown. This affects the behavior for __GFP_WAIT callers, who should
verify the return value before dereferencing.

Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Acked-by: Jiri Kosina <jkosina@suse.cz> [for pktdvd]
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jens Axboe <axboe@fb.com>