scsi: qla2xxx: Fix qla24xx_process_bidir_cmd()

[ Upstream commit c29282c65d1cf54daeea63be46243d7f69d72f4d ]

Set the r??_data_len variables before using these instead of after.

This patch fixes the following Coverity complaint:

const: At condition req_data_len != rsp_data_len, the value of req_data_len
must be equal to 0.
const: At condition req_data_len != rsp_data_len, the value of rsp_data_len
must be equal to 0.
dead_error_condition: The condition req_data_len != rsp_data_len cannot be
true.

Cc: Himanshu Madhani <hmadhani@marvell.com>
Fixes: a9b6f722f62d ("[SCSI] qla2xxx: Implementation of bidirectional.") # v3.7.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Himanshu Madhani <hmadhani@marvell.com>
Reviewed-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index df856a2..68ec669 100644 (file)
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -1743,8 +1743,8 @@ qla24xx_process_bidir_cmd(struct fc_bsg_job *bsg_job)
        uint16_t nextlid = 0;
        uint32_t tot_dsds;
        srb_t *sp = NULL;
-       uint32_t req_data_len = 0;
-       uint32_t rsp_data_len = 0;
+       uint32_t req_data_len;
+       uint32_t rsp_data_len;
 
        /* Check the type of the adapter */
        if (!IS_BIDI_CAPABLE(ha)) {
@@ -1849,6 +1849,9 @@ qla24xx_process_bidir_cmd(struct fc_bsg_job *bsg_job)
                goto done_unmap_sg;
        }
 
+       req_data_len = bsg_job->request_payload.payload_len;
+       rsp_data_len = bsg_job->reply_payload.payload_len;
+
        if (req_data_len != rsp_data_len) {
                rval = EXT_STATUS_BUSY;
                ql_log(ql_log_warn, vha, 0x70aa,
@@ -1856,10 +1859,6 @@ qla24xx_process_bidir_cmd(struct fc_bsg_job *bsg_job)
                goto done_unmap_sg;
        }
 
-       req_data_len = bsg_job->request_payload.payload_len;
-       rsp_data_len = bsg_job->reply_payload.payload_len;
-
-
        /* Alloc SRB structure */
        sp = qla2x00_get_sp(vha, &(vha->bidir_fcport), GFP_KERNEL);
        if (!sp) {