drivers/video/backlight/ot200_bl.c: use devm_ functions

The devm_ functions allocate memory that is released when a driver
detaches. This patch uses devm_kzalloc of these functions

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/video/backlight/ot200_bl.c b/drivers/video/backlight/ot200_bl.c
index f519d55..ef637ff 100644 (file)
--- a/drivers/video/backlight/ot200_bl.c
+++ b/drivers/video/backlight/ot200_bl.c
@@ -97,10 +97,10 @@ static int ot200_backlight_probe(struct platform_device *pdev)
                goto error_mfgpt_alloc;
        }
 
-       data = kzalloc(sizeof(*data), GFP_KERNEL);
+       data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
        if (!data) {
                retval = -ENOMEM;
-               goto error_kzalloc;
+               goto error_devm_kzalloc;
        }
 
        /* setup gpio */
@@ -122,16 +122,14 @@ static int ot200_backlight_probe(struct platform_device *pdev)
        if (IS_ERR(bl)) {
                dev_err(&pdev->dev, "failed to register backlight\n");
                retval = PTR_ERR(bl);
-               goto error_backlight_device_register;
+               goto error_devm_kzalloc;
        }
 
        platform_set_drvdata(pdev, bl);
 
        return 0;
 
-error_backlight_device_register:
-       kfree(data);
-error_kzalloc:
+error_devm_kzalloc:
        cs5535_mfgpt_free_timer(pwm_timer);
 error_mfgpt_alloc:
        gpio_free(GPIO_DIMM);
@@ -141,7 +139,6 @@ error_mfgpt_alloc:
 static int ot200_backlight_remove(struct platform_device *pdev)
 {
        struct backlight_device *bl = platform_get_drvdata(pdev);
-       struct ot200_backlight_data *data = bl_get_data(bl);
 
        backlight_device_unregister(bl);
 
@@ -154,7 +151,6 @@ static int ot200_backlight_remove(struct platform_device *pdev)
        cs5535_mfgpt_free_timer(pwm_timer);
        gpio_free(GPIO_DIMM);
 
-       kfree(data);
        return 0;
 }