diff options
| author | Avri Altman <avri.altman@wdc.com> | 2019-02-20 09:11:13 +0200 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-02-27 08:59:13 -0500 |
| commit | 4bbbe2421634fe1d1b230006200ad9cdb0e17a9e (patch) | |
| tree | c577ae5463460763888a1be48fa389936b3c8e40 /drivers/scsi | |
| parent | 4eaa329e331343dd64996297583f2eee7d215e2a (diff) | |
scsi: ufs: Allow reading descriptor via raw upiu
Allow to read descriptors via raw upiu. This in fact was forbidden just as
a precaution, as ufs-bsg actually enforces which functionality is
supported.
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index 85ebe7cab440..3da21bb149a4 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -5769,6 +5769,20 @@ static int ufshcd_issue_devman_upiu_cmd(struct ufs_hba *hba, /* just copy the upiu response as it is */ memcpy(rsp_upiu, lrbp->ucd_rsp_ptr, sizeof(*rsp_upiu)); + if (desc_buff && desc_op == UPIU_QUERY_OPCODE_READ_DESC) { + u8 *descp = (u8 *)lrbp->ucd_rsp_ptr + sizeof(*rsp_upiu); + u16 resp_len = be32_to_cpu(lrbp->ucd_rsp_ptr->header.dword_2) & + MASK_QUERY_DATA_SEG_LEN; + + if (*buff_len >= resp_len) { + memcpy(desc_buff, descp, resp_len); + *buff_len = resp_len; + } else { + dev_warn(hba->dev, "rsp size is bigger than buffer"); + *buff_len = 0; + err = -EINVAL; + } + } ufshcd_put_dev_cmd_tag(hba, tag); wake_up(&hba->dev_cmd.tag_wq); @@ -5804,11 +5818,6 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, int ocs_value; u8 tm_f = be32_to_cpu(req_upiu->header.dword_1) >> 16 & MASK_TM_FUNC; - if (desc_buff && desc_op != UPIU_QUERY_OPCODE_WRITE_DESC) { - err = -ENOTSUPP; - goto out; - } - switch (msgcode) { case UPIU_TRANSACTION_NOP_OUT: cmd_type = DEV_CMD_TYPE_NOP; @@ -5849,7 +5858,6 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba, break; } -out: return err; } |