OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

blk-mq-sched: check for successful allocation before assigning tag 

We don't trigger this from the normal IO path, since we always use
blocking allocations from there. But Bart saw it testing multipath
dm, since that is a heavy user of atomic request allocations in
the map and clone path.

Reported-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jens Axboe 2017-01-26 14:52:20 -07:00
parent 5a797e00dc
commit b48fda0976
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
block/blk-mq-sched.c
View File

@ -134,7 +134,8 @@ struct request *blk_mq_sched_get_request(struct request_queue *q,
rq = __blk_mq_alloc_request(data, op);
} else {
rq = __blk_mq_alloc_request(data, op);
data->hctx->tags->rqs[rq->tag] = rq;
if (rq)
data->hctx->tags->rqs[rq->tag] = rq;
}
if (rq) {