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nbd: Fix error handling

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'blk_mq_alloc_request()' returns an error pointer in case of error, not
NULL. So test it with IS_ERR.

Fixes: 	fd8383fd88 ("nbd: convert to blkmq")

Signed-off-by: Christophe JAILLET <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Christophe JAILLET 2016-10-30 05:28:27 +01:00 • committed by Jens Axboe
commit 772918524d
1 changed files with 1 additions and 1 deletions
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2
drivers/block/nbd.c
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@ -599,7 +599,7 @@ static int __nbd_ioctl(struct block_device *bdev, struct nbd_device *nbd,
return -EINVAL;
sreq = blk_mq_alloc_request(bdev_get_queue(bdev), WRITE, 0);
if (!sreq)
if (IS_ERR(sreq))
return -ENOMEM;
mutex_unlock(&nbd->tx_lock);