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-rw-r--r--fs/bio.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/bio.c b/fs/bio.c
index 9d68ddb89b7..355302985e2 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -547,11 +547,11 @@ static int __bio_copy_iov(struct bio *bio, struct bio_vec *iovecs,
int bio_uncopy_user(struct bio *bio)
{
struct bio_map_data *bmd = bio->bi_private;
- int ret;
-
- ret = __bio_copy_iov(bio, bmd->iovecs, bmd->sgvecs, bmd->nr_sgvecs, 1,
- bmd->is_our_pages);
+ int ret = 0;
+ if (!bio_flagged(bio, BIO_NULL_MAPPED))
+ ret = __bio_copy_iov(bio, bmd->iovecs, bmd->sgvecs,
+ bmd->nr_sgvecs, 1, bmd->is_our_pages);
bio_free_map_data(bmd);
bio_put(bio);
return ret;