diff options
| author | Zang Leigang <zangleigang@hisilicon.com> | 2016-08-25 17:39:19 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2016-09-29 21:30:17 -0400 |
| commit | 6861285ce8f8a9a55aab4775847de6e48b2dc7f2 (patch) | |
| tree | 4ef78852bb3f0e2ac5e30f232eaeaabb8edd60a4 /drivers/scsi | |
| parent | fe9b34bfcb4e80b809a8a3dccdd49737d073593b (diff) | |
| download | linux-6861285ce8f8a9a55aab4775847de6e48b2dc7f2.tar.bz2 | |
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>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 37f3c51e9d92..d2ec42512641 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, |