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block: handle the null_mapped flag correctly in blk_rq_map_user_iov
[firefly-linux-kernel-4.4.55.git]
/
block
/
blk-map.c
diff --git
a/block/blk-map.c
b/block/blk-map.c
index 0f22911f17dc42f8e969c9f69a2d493c7821b16a..b8d2725324a6b88391db4c8a5daf7a9c1309dd86 100644
(file)
--- a/
block/blk-map.c
+++ b/
block/blk-map.c
@@
-93,6
+93,9
@@
int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
if (IS_ERR(bio))
return PTR_ERR(bio);
+ if (map_data && map_data->null_mapped)
+ bio->bi_flags |= (1 << BIO_NULL_MAPPED);
+
if (bio->bi_iter.bi_size != iter->count) {
/*
* Grab an extra reference to this bio, as bio_unmap_user()