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, 4 insertions, 5 deletions

diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c
index 331f1ef1dad5..7ff752288b92 100644
--- a/drivers/video/backlight/aat2870_bl.c
+++ b/drivers/video/backlight/aat2870_bl.c
@@ -145,7 +145,9 @@ static int aat2870_bl_probe(struct platform_device *pdev)
                 goto out;
         }
 
-        aat2870_bl = kzalloc(sizeof(struct aat2870_bl_driver_data), GFP_KERNEL);
+        aat2870_bl = devm_kzalloc(&pdev->dev,
+                                  sizeof(struct aat2870_bl_driver_data),
+                                  GFP_KERNEL);
         if (!aat2870_bl) {
                 dev_err(&pdev->dev,
                         "Failed to allocate memory for aat2870 backlight\n");
@@ -162,7 +164,7 @@ static int aat2870_bl_probe(struct platform_device *pdev)
                 dev_err(&pdev->dev,
                         "Failed allocate memory for backlight device\n");
                 ret = PTR_ERR(bd);
-                goto out_kfree;
+                goto out;
         }
 
         aat2870_bl->pdev = pdev;
@@ -199,8 +201,6 @@ static int aat2870_bl_probe(struct platform_device *pdev)
 
 out_bl_dev_unregister:
         backlight_device_unregister(bd);
-out_kfree:
-        kfree(aat2870_bl);
 out:
         return ret;
 }
@@ -215,7 +215,6 @@ static int aat2870_bl_remove(struct platform_device *pdev)
         backlight_update_status(bd);
 
         backlight_device_unregister(bd);
-        kfree(aat2870_bl);
 
         return 0;
 }