From: FUJITA Tomonori <tomof@acm.org>
Date: Sat, 21 Jul 2007 04:23:25 +0000 (+0900)
Subject: [SCSI] bsg: fix bsg_unregister_queue
X-Git-Tag: v3.12-rc1~27601^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=df468820b6881fc14e50f6b2fcffd3e945417d68;p=kernel%2Fkernel-generic.git

[SCSI] bsg: fix bsg_unregister_queue

scsi_sysfs_add_sdev ignores the bsg_register_queue failure, so
bsg_unregister_queue must check whether the queue has a bsg device.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---

diff --git a/block/bsg.c b/block/bsg.c
index 4eebcd5..1ba9bc6 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -932,7 +932,8 @@ void bsg_unregister_queue(struct request_queue *q)
 {
 	struct bsg_class_device *bcd = &q->bsg_dev;
 
-	WARN_ON(!bcd->class_dev);
+	if (!bcd->class_dev)
+		return;
 
 	mutex_lock(&bsg_mutex);
 	sysfs_remove_link(&q->kobj, "bsg");