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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>
This commit is contained in:
Avri Altman 2019-02-20 09:11:13 +02:00 committed by Martin K. Petersen
parent 4eaa329e33
commit 4bbbe24216
1 changed files with 14 additions and 6 deletions
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20
drivers/scsi/ufs/ufshcd.c
View File

@ -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;
}