linux-kernel - [PATCH] scsi: lpfc: Reduce scope of uuid in lpfc

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Date:   Thu, 17 Jun 2021 16:37:59 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     James Smart <james.smart@...adcom.com>,
        Dick Kennedy <dick.kennedy@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Cc:     Gaurav Srivastava <gaurav.srivastava@...adcom.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH] scsi: lpfc: Reduce scope of uuid in lpfc_queuecommand()

When CONFIG_SCSI_LPFC_DEBUG_FS is unset, uuid's declaration is not
present, resulting in a compiler error:

drivers/scsi/lpfc/lpfc_scsi.c:5595:3: error: use of undeclared
identifier 'uuid'
                uuid = lpfc_is_command_vm_io(cmnd);
                ^

uuid is only used in the if statement so reduce its scope to solve the
build error. Additionally, uuid is a char *, instead of u8 *.

Fixes: 33c79741deaf ("scsi: lpfc: vmid: Introduce VMID in I/O path")
Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 drivers/scsi/lpfc/lpfc_scsi.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 46bfe251c2fe..e8af51e38614 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -5457,7 +5457,6 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
 	int err, idx;
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
 	uint64_t start = 0L;
-	u8 *uuid = NULL;
 
 	if (phba->ktime_on)
 		start = ktime_get_ns();
@@ -5592,7 +5591,7 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
 	     LPFC_VMID_PRIO_TAG_ALL_TARGETS)) {
 		/* is the I/O generated by a VM, get the associated virtual */
 		/* entity id */
-		uuid = lpfc_is_command_vm_io(cmnd);
+		char *uuid = lpfc_is_command_vm_io(cmnd);
 
 		if (uuid) {
 			err = lpfc_vmid_get_appid(vport, uuid, cmnd,

base-commit: ebc076b3eddc807729bd81f7bc48e798a3ddc477
-- 
2.32.0.93.g670b81a890