drivers/video/backlight: use devm_ functions

The various devm_ functions allocate memory that is released when a driver
detaches.  This patch uses these functions for data that is allocated in
the probe function of a platform device and is only freed in the remove
function.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 6 deletions

diff --git a/drivers/video/backlight/omap1_bl.c b/drivers/video/backlight/omap1_bl.c
index d8cde277ec83..0175bfb08a1c 100644
--- a/drivers/video/backlight/omap1_bl.c
+++ b/drivers/video/backlight/omap1_bl.c
@@ -141,7 +141,8 @@ static int omapbl_probe(struct platform_device *pdev)
         if (!pdata)
                 return -ENXIO;
 
-        bl = kzalloc(sizeof(struct omap_backlight), GFP_KERNEL);
+        bl = devm_kzalloc(&pdev->dev, sizeof(struct omap_backlight),
+                          GFP_KERNEL);
         if (unlikely(!bl))
                 return -ENOMEM;
 
@@ -150,10 +151,8 @@ static int omapbl_probe(struct platform_device *pdev)
         props.max_brightness = OMAPBL_MAX_INTENSITY;
         dev = backlight_device_register("omap-bl", &pdev->dev, bl, &omapbl_ops,
                                         &props);
-        if (IS_ERR(dev)) {
-                kfree(bl);
+        if (IS_ERR(dev))
                 return PTR_ERR(dev);
-        }
 
         bl->powermode = FB_BLANK_POWERDOWN;
         bl->current_intensity = 0;
@@ -177,10 +176,8 @@ static int omapbl_probe(struct platform_device *pdev)
 static int omapbl_remove(struct platform_device *pdev)
 {
         struct backlight_device *dev = platform_get_drvdata(pdev);
-        struct omap_backlight *bl = dev_get_drvdata(&dev->dev);
 
         backlight_device_unregister(dev);
-        kfree(bl);
 
         return 0;
 }