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scsi: ufs: Data Segment only needed for WRITE DESCRIPTOR 

Some devices have problems handling a Query UPIU with Data Segment
set. Only set it for WRITE DESCRIPTOR commands.

[mkp: updated patch description]

Signed-off-by: Zang Leigang <zangleigang@hisilicon.com>
Reviewed-by: Subhash Jadavani <subhashj@codeaurora.org>
Reviewed-by: Kiwoong Kim <kwmad.kim@samsung.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Zang Leigang 2016-08-25 17:39:19 +08:00 committed by Martin K. Petersen
parent fe9b34bfcb
commit 6861285ce8
1 changed files with 6 additions and 3 deletions
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9
drivers/scsi/ufs/ufshcd.c
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@ -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,