From f8dcd695ca1ae6d931f7b4015299c6db8cc9222e Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@suse.de>
Date: Wed, 24 Aug 2011 10:51:17 +0200
Subject: [PATCH] [SCSI] scsi_dh: Check for sdev state in store_dh_state()
Avoid attaching a hardware handler to a device which is
already scheduled for deletion.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---
drivers/scsi/device_handler/scsi_dh.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c
index 3ac71cf6b7f0e..7c05fd9dccfd1 100644
--- a/drivers/scsi/device_handler/scsi_dh.c
+++ b/drivers/scsi/device_handler/scsi_dh.c
@@ -190,6 +190,10 @@ store_dh_state(struct device *dev, struct device_attribute *attr,
struct scsi_device_handler *scsi_dh;
int err = -EINVAL;
+ if (sdev->sdev_state == SDEV_CANCEL ||
+ sdev->sdev_state == SDEV_DEL)
+ return -ENODEV;
+
if (!sdev->scsi_dh_data) {
/*
* Attach to a device handler
--
2.39.5