linux-kernel - [66/74] imxfb: correct location of callbacks in suspend and resume

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Message-Id: <20100204171525.493312894@linux.site>
Date:	Thu, 04 Feb 2010 09:12:37 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Uwe Kleine-KÃ¶nig 
	<u.kleine-koenig@...gutronix.de>,
	Sascha Hauer <kernel@...gutronix.de>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [66/74] imxfb: correct location of callbacks in suspend and resume

2.6.32-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Uwe Kleine-König  <u.kleine-koenig@...gutronix.de>

commit 1ec562035ba64e724652cb12b8a770b3906e9bf5 upstream.

The probe function passes a pointer to a struct fb_info to
platform_set_drvdata(), so don't interpret the return value of
platform_get_drvdata() as a pointer to struct imxfb_info.

The original imxfb_info *fbi backlight_power was NULL but in imxfb_suspend
it was 4 resulting in an oops as imxfb_suspend calls
imxfb_disable_controller(fbi) which in turn has

	if (fbi->backlight_power)
			fbi->backlight_power(0);

Signed-off-by: Uwe Kleine-König  <u.kleine-koenig@...gutronix.de>
Acked-by: Sascha Hauer <kernel@...gutronix.de>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/video/imxfb.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/video/imxfb.c
+++ b/drivers/video/imxfb.c
@@ -593,7 +593,8 @@ static int imxfb_activate_var(struct fb_
  */
 static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
 {
-	struct imxfb_info *fbi = platform_get_drvdata(dev);
+	struct fb_info *info = platform_get_drvdata(dev);
+	struct imxfb_info *fbi = info->par;
 
 	pr_debug("%s\n", __func__);
 
@@ -603,7 +604,8 @@ static int imxfb_suspend(struct platform
 
 static int imxfb_resume(struct platform_device *dev)
 {
-	struct imxfb_info *fbi = platform_get_drvdata(dev);
+	struct fb_info *info = platform_get_drvdata(dev);
+	struct imxfb_info *fbi = info->par;
 
 	pr_debug("%s\n", __func__);
 


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