scsi: ufs: remove unnecessary query(DM) UPIU trace

This patch removes redundant trace that occurs when sending Device
Management(DM) request (fix behavior in commit 6667e6d91c88 ("scsi:
ufs: add trace event for ufs upiu").

Since the function send_command is called also for DM request, UPIU
trace for DM request is called twice- one identified as query_* the
other as send/complete.

Signed-off-by: Ohad Sharabi <ohad.sharabi@wdc.com>
Fixes: 6667e6d91c88 ("scsi: ufs: add trace event for ufs upiu")
Reviewed-by: Stanislav Nijnikov <stanislav.nijnikov@wdc.com>
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufshcd.c

@@ -342,18 +342,19 @@ static void ufshcd_add_command_trace(struct ufs_hba *hba,
 	sector_t lba = -1;
 	u8 opcode = 0;
 	u32 intr, doorbell;
-	struct ufshcd_lrb *lrbp;
+	struct ufshcd_lrb *lrbp = &hba->lrb[tag];
 	int transfer_len = -1;
 
-	/* trace UPIU also */
-	ufshcd_add_cmd_upiu_trace(hba, tag, str);
-
-	if (!trace_ufshcd_command_enabled())
+	if (!trace_ufshcd_command_enabled()) {
+		/* trace UPIU W/O tracing command */
+		if (lrbp->cmd)
+			ufshcd_add_cmd_upiu_trace(hba, tag, str);
 		return;
-
-	lrbp = &hba->lrb[tag];
+	}
 
 	if (lrbp->cmd) { /* data phase exists */
+		/* trace UPIU also */
+		ufshcd_add_cmd_upiu_trace(hba, tag, str);
 		opcode = (u8)(*lrbp->cmd->cmnd);
 		if ((opcode == READ_10) || (opcode == WRITE_10)) {
 			/*