From: Hannes Reinecke <hare@suse.com>
Date: Sun, 7 Oct 2018 10:35:35 +0200
Subject: [PATCH] scsi: core: Allow state transitions from OFFLINE to BLOCKED
Git-commit: a33e5bfb29721015349a3864c91abe11f6195d5c
Patch-Mainline: v4.20-rc1
References: bsc#1112246

When an RSCN gets delayed (or not being sent at all), the transport class
will detect an error, EH kicks in, and eventually will be setting the
device to offline.  If we receive an RSCN after that, the device will
stay in 'offline'.  This patch allows for an 'offline' to 'blocked'
transition, thereby allowing the device to become active again.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/scsi_lib.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index aaa1819b0a69..7db3c5fae469 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2764,6 +2764,7 @@ scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state)
 		switch (oldstate) {
 		case SDEV_RUNNING:
 		case SDEV_CREATED_BLOCK:
+		case SDEV_OFFLINE:
 			break;
 		default:
 			goto illegal;
-- 
2.16.4