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blk-mq: Exit queue on alloc failure

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Fixes usage counter when a request could not be allocated.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Keith Busch
2014-12-19 17:54:13 -07:00
committed by Jens Axboe
parent ecb5ec044a
commit c76541a932
1 changed files with 3 additions and 1 deletions
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block/blk-mq.c
+3 -1
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@@ -258,8 +258,10 @@ struct request *blk_mq_alloc_request(struct request_queue *q, int rw, gfp_t gfp,
ctx = alloc_data.ctx; ctx = alloc_data.ctx;
} }
blk_mq_put_ctx(ctx); blk_mq_put_ctx(ctx);
if (!rq) if (!rq) {
blk_mq_queue_exit(q);
return ERR_PTR(-EWOULDBLOCK); return ERR_PTR(-EWOULDBLOCK);
}
return rq; return rq;
} }
EXPORT_SYMBOL(blk_mq_alloc_request); EXPORT_SYMBOL(blk_mq_alloc_request);