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block: cleanup error handling in sg_io

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Make sure we always clean up through the out label and just have
a single place to put the request.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2014-08-21 20:38:27 -05:00 committed by Jens Axboe
parent aeac318194
commit 2cada584b2
1 changed files with 4 additions and 6 deletions
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10
block/scsi_ioctl.c
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@ -279,7 +279,6 @@ static int blk_complete_sghdr_rq(struct request *rq, struct sg_io_hdr *hdr,
r = blk_rq_unmap_user(bio); r = blk_rq_unmap_user(bio);
if (!ret) if (!ret)
ret = r; ret = r;
blk_put_request(rq);
return ret; return ret;
} }
@ -322,10 +321,9 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
return -ENOMEM; return -ENOMEM;
blk_rq_set_block_pc(rq); blk_rq_set_block_pc(rq);
if (blk_fill_sghdr_rq(q, rq, hdr, mode)) { ret = -EFAULT;
blk_put_request(rq); if (blk_fill_sghdr_rq(q, rq, hdr, mode))
return -EFAULT; goto out;
}
if (hdr->iovec_count) { if (hdr->iovec_count) {
size_t iov_data_len; size_t iov_data_len;
@ -376,7 +374,7 @@ static int sg_io(struct request_queue *q, struct gendisk *bd_disk,
hdr->duration = jiffies_to_msecs(jiffies - start_time); hdr->duration = jiffies_to_msecs(jiffies - start_time);
return blk_complete_sghdr_rq(rq, hdr, bio); ret = blk_complete_sghdr_rq(rq, hdr, bio);
out: out:
blk_put_request(rq); blk_put_request(rq);
return ret; return ret;