Looks good to me.
Reviewed-by: Subhash Jadavani <subha...@codeaurora.org>

On 2016-08-25 02:39, Zang Leigang wrote:
Some device may cause a compatibility issue while receiving a Query UPIU
with Data Segment which does not expected.

Signed-off-by: Zang Leigang <zangleig...@hisilicon.com>
---
 drivers/scsi/ufs/ufshcd.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index f08d41a..9b21d88 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1266,9 +1266,12 @@ static void
ufshcd_prepare_utp_query_req_upiu(struct ufs_hba *hba,
        ucd_req_ptr->header.dword_1 = UPIU_HEADER_DWORD(
                        0, query->request.query_func, 0, 0);

-       /* Data segment length */
-       ucd_req_ptr->header.dword_2 = UPIU_HEADER_DWORD(
-                       0, 0, len >> 8, (u8)len);
+       /* Data segment length only need for WRITE_DESC */
+       if (query->request.upiu_req.opcode == UPIU_QUERY_OPCODE_WRITE_DESC)
+               ucd_req_ptr->header.dword_2 =
+                       UPIU_HEADER_DWORD(0, 0, (len >> 8), (u8)len);
+       else
+               ucd_req_ptr->header.dword_2 = 0;

        /* Copy the Query Request buffer as is */
        memcpy(&ucd_req_ptr->qr, &query->request.upiu_req,
--
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