Commit b48fda09 authored by Jens Axboe's avatar Jens Axboe
Browse files

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: default avatarBart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 5a797e00
......@@ -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) {
......
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