[PATCH 1/1] xen/blkfront: fix comment for need_copy

[Dongli Zhang]

The 'need_copy' is set when rq_data_dir(req) returns WRITE, in order to
copy the written data to persistent page.

".need_copy = rq_data_dir(req) && info->feature_persistent,"

Signed-off-by: Dongli Zhang <dongli.zh...@oracle.com>
---
 drivers/block/xen-blkfront.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 03b5fb341e58..dbc32d0a4b1a 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -576,7 +576,7 @@ struct setup_rw_req {
        struct blkif_request *ring_req;
        grant_ref_t gref_head;
        unsigned int id;
-       /* Only used when persistent grant is used and it's a read request */
+       /* Only used when persistent grant is used and it's a write request */
        bool need_copy;
        unsigned int bvec_off;
        char *bvec_data;
-- 
2.17.1