linux-kernel - [GIT PULL] SCSI fixes for 2.6.39-rc6

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Date:	Fri, 06 May 2011 11:41:25 -0500
From:	James Bottomley <James.Bottomley@...e.de>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [GIT PULL] SCSI fixes for 2.6.39-rc6

Actually, it's just one fix ... another oops triggered by a previous
fix.

The patch is available here:

master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6.git

The short changelog is:

James Bottomley (1):
      fix oops in scsi_run_queue()

The diffstat is:

 drivers/scsi/scsi_lib.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

And the full diff below.

James

---

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index e9901b8..0bac91e 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -400,10 +400,15 @@ static inline int scsi_host_is_busy(struct Scsi_Host *shost)
 static void scsi_run_queue(struct request_queue *q)
 {
 	struct scsi_device *sdev = q->queuedata;
-	struct Scsi_Host *shost = sdev->host;
+	struct Scsi_Host *shost;
 	LIST_HEAD(starved_list);
 	unsigned long flags;
 
+	/* if the device is dead, sdev will be NULL, so no queue to run */
+	if (!sdev)
+		return;
+
+	shost = sdev->host;
 	if (scsi_target(sdev)->single_lun)
 		scsi_single_lun_run(sdev);
 


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