drivers/video/backlight/wm831x_bl.c: 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>
Acked-by: 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, 1 insertions, 5 deletions

diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c
index 4e915f5eca99..5d365deb5f82 100644
--- a/drivers/video/backlight/wm831x_bl.c
+++ b/drivers/video/backlight/wm831x_bl.c
@@ -186,7 +186,7 @@ static int wm831x_backlight_probe(struct platform_device *pdev)
         if (ret < 0)
                 return ret;
 
-        data = kzalloc(sizeof(*data), GFP_KERNEL);
+        data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
         if (data == NULL)
                 return -ENOMEM;
 
@@ -200,7 +200,6 @@ static int wm831x_backlight_probe(struct platform_device *pdev)
                                        &wm831x_backlight_ops, &props);
         if (IS_ERR(bl)) {
                 dev_err(&pdev->dev, "failed to register backlight\n");
-                kfree(data);
                 return PTR_ERR(bl);
         }
 
@@ -211,7 +210,6 @@ static int wm831x_backlight_probe(struct platform_device *pdev)
         /* Disable the DCDC if it was started so we can bootstrap */
         wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, WM831X_DC4_ENA, 0);
 
-
         backlight_update_status(bl);
 
         return 0;
@@ -220,10 +218,8 @@ static int wm831x_backlight_probe(struct platform_device *pdev)
 static int wm831x_backlight_remove(struct platform_device *pdev)
 {
         struct backlight_device *bl = platform_get_drvdata(pdev);
-        struct wm831x_backlight_data *data = bl_get_data(bl);
 
         backlight_device_unregister(bl);
-        kfree(data);
         return 0;
 }