From 6e1038a95bebb8a1ad6066c95aa9c3af6963c9ff Mon Sep 17 00:00:00 2001
From: Magnus Damm <damm@igel.co.jp>
Date: Fri, 19 Dec 2008 15:34:23 +0900
Subject: video: deferred io cleanup

Make sure the mmap callback is set to NULL in the deferred io
cleanup function. This way we can enable and disable deferred
io on the fly.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 drivers/video/fb_defio.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'drivers/video/fb_defio.c')

diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c
index e6dafeddfa5..06060ccd3c2 100644
--- a/drivers/video/fb_defio.c
+++ b/drivers/video/fb_defio.c
@@ -202,6 +202,9 @@ void fb_deferred_io_cleanup(struct fb_info *info)
 		page = vmalloc_to_page(screen_base + i);
 		page->mapping = NULL;
 	}
+
+	info->fbops->fb_mmap = NULL;
+	mutex_destroy(&fbdefio->lock);
 }
 EXPORT_SYMBOL_GPL(fb_deferred_io_cleanup);
 
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