From: Hannes Reinecke <hare@suse.de>
Date: Fri, 11 Aug 2017 08:53:46 +0200
Subject: [PATCH] scsi: scsi_lib: rework scsi_internal_device_unblock_nowait()
References: bsc#1061782
Git-commit: 8cd1ec78ca15f1016f6c3c683c21b3383b5cb966
Patch-Mainline: v4.14-rc1

Rework scsi_internal_device_unblock_nowait() into using a switch
statement. No functional changes.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/scsi/scsi_lib.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 44d0639..f5e4259 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -3073,19 +3073,24 @@ int scsi_internal_device_unblock_nowait(struct scsi_device *sdev,
 	 * Try to transition the scsi device to SDEV_RUNNING or one of the
 	 * offlined states and goose the device queue if successful.
 	 */
-	if ((sdev->sdev_state == SDEV_BLOCK) ||
-	    (sdev->sdev_state == SDEV_TRANSPORT_OFFLINE))
+	switch (sdev->sdev_state) {
+	case SDEV_BLOCK:
+	case SDEV_TRANSPORT_OFFLINE:
 		sdev->sdev_state = new_state;
-	else if (sdev->sdev_state == SDEV_CREATED_BLOCK) {
+		break;
+	case SDEV_CREATED_BLOCK:
 		if (new_state == SDEV_TRANSPORT_OFFLINE ||
 		    new_state == SDEV_OFFLINE)
 			sdev->sdev_state = new_state;
 		else
 			sdev->sdev_state = SDEV_CREATED;
-	} else if (sdev->sdev_state != SDEV_CANCEL &&
-		 sdev->sdev_state != SDEV_OFFLINE)
+		break;
+	case SDEV_CANCEL:
+	case SDEV_OFFLINE:
+		break;
+	default:
 		return -EINVAL;
-
+	}
 	scsi_start_queue(sdev);
 
 	return 0;
-- 
1.8.5.6