From: Jens Axboe <axboe@suse.de>
Date: Sat, 10 Sep 2005 12:17:10 +0000 (+0200)
Subject: [PATCH] cfq-iosched: reverse bad reference count fix
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=35797132b311b3b7d4add48393b0a03f3566cbc1;p=linux-beck.git

[PATCH] cfq-iosched: reverse bad reference count fix

The reference count fix merged isn't fully bug free. It doesn't leak
now, but instead it crashes due to looking at freed memory. So for now,
lets reverse the change and I'll fix it for real next week.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/block/cfq-iosched.c b/drivers/block/cfq-iosched.c
index 30c0903c7cdd..cd056e7e64ec 100644
--- a/drivers/block/cfq-iosched.c
+++ b/drivers/block/cfq-iosched.c
@@ -2260,6 +2260,8 @@ static void cfq_put_cfqd(struct cfq_data *cfqd)
 	if (!atomic_dec_and_test(&cfqd->ref))
 		return;
 
+	blk_put_queue(q);
+
 	cfq_shutdown_timer_wq(cfqd);
 	q->elevator->elevator_data = NULL;
 
@@ -2316,6 +2318,7 @@ static int cfq_init_queue(request_queue_t *q, elevator_t *e)
 	e->elevator_data = cfqd;
 
 	cfqd->queue = q;
+	atomic_inc(&q->refcnt);
 
 	cfqd->max_queued = q->nr_requests / 4;
 	q->nr_batching = cfq_queued;