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[PATCH] __blk_rq_unmap_user() fails to return error 

If the bio is user copied, the copy back could return -EFAULT. Make
sure we return any error seen during unmapping.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2006-12-19 11:07:59 +01:00
parent 9c9381f942
commit 48785bb9fa
1 changed files with 7 additions and 2 deletions
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9
block/ll_rw_blk.c
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@ -2504,6 +2504,7 @@ EXPORT_SYMBOL(blk_rq_map_user_iov);
int blk_rq_unmap_user(struct request *rq)
{
struct bio *bio, *mapped_bio;
int ret = 0, ret2;
while ((bio = rq->bio)) {
if (bio_flagged(bio, BIO_BOUNCED))
@ -2511,11 +2512,15 @@ int blk_rq_unmap_user(struct request *rq)
else
mapped_bio = bio;
__blk_rq_unmap_user(mapped_bio);
ret2 = __blk_rq_unmap_user(mapped_bio);
if (ret2 && !ret)
ret = ret2;
rq->bio = bio->bi_next;
bio_put(bio);
}
return 0;
return ret;
}
EXPORT_SYMBOL(blk_rq_unmap_user);