linux-kernel - re:Possible deadlock when suspending framebuffer

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Message-ID: <1308100165.2113.4.camel@Tux>
Date:	Wed, 15 Jun 2011 09:09:24 +0800
From:	Wanlong Gao <wanlong.gao@...il.com>
To:	Francis Moreau <francis.moro@...il.com>
Cc:	Paul Mundt <lethal@...ux-sh.org>, linux-fbdev@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Francis Moreau <francis.moro@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: re:Possible deadlock when suspending framebuffer

<snip>
Hi Francis:
can you test this patch?
Thanks

>From fe026c42af4cbdce053460a428a445e99071586a Mon Sep 17 00:00:00 2001
From: Wanlong Gao <wanlong.gao@...il.com>
Date: Wed, 15 Jun 2011 09:03:41 +0800
Subject: [PATCH] test



Signed-off-by: Wanlong Gao <wanlong.gao@...il.com>
---
 drivers/video/fbmem.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 5aac00e..6e6cef3 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1642,11 +1642,8 @@ static int do_unregister_framebuffer(struct
fb_info *fb_info)
 	if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
 		return -EINVAL;
 
-	if (!lock_fb_info(fb_info))
-		return -ENODEV;
 	event.info = fb_info;
 	ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
-	unlock_fb_info(fb_info);
 
 	if (ret)
 		return -EINVAL;
-- 
1.7.4.1



View attachment "0001-test.patch" of type "text/x-patch" (837 bytes)