backlight: corgi_lcd: 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: Eric Miao <eric.y.miao@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>

drivers/video/backlight/corgi_lcd.c

@@ -544,7 +544,7 @@ static int __devinit corgi_lcd_probe(struct spi_device *spi)
 		return -EINVAL;
 	}
 
-	lcd = kzalloc(sizeof(struct corgi_lcd), GFP_KERNEL);
+	lcd = devm_kzalloc(&spi->dev, sizeof(struct corgi_lcd), GFP_KERNEL);
 	if (!lcd) {
 		dev_err(&spi->dev, "failed to allocate memory\n");
 		return -ENOMEM;
@@ -554,10 +554,9 @@ static int __devinit corgi_lcd_probe(struct spi_device *spi)
 
 	lcd->lcd_dev = lcd_device_register("corgi_lcd", &spi->dev,
 					lcd, &corgi_lcd_ops);
-	if (IS_ERR(lcd->lcd_dev)) {
-		ret = PTR_ERR(lcd->lcd_dev);
-		goto err_free_lcd;
-	}
+	if (IS_ERR(lcd->lcd_dev))
+		return PTR_ERR(lcd->lcd_dev);
+
 	lcd->power = FB_BLANK_POWERDOWN;
 	lcd->mode = (pdata) ? pdata->init_mode : CORGI_LCD_MODE_VGA;
 
@@ -591,8 +590,6 @@ static int __devinit corgi_lcd_probe(struct spi_device *spi)
 	backlight_device_unregister(lcd->bl_dev);
 err_unregister_lcd:
 	lcd_device_unregister(lcd->lcd_dev);
-err_free_lcd:
-	kfree(lcd);
 	return ret;
 }
 
@@ -613,7 +610,6 @@ static int __devexit corgi_lcd_remove(struct spi_device *spi)
 
 	corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_POWERDOWN);
 	lcd_device_unregister(lcd->lcd_dev);
-	kfree(lcd);
 
 	return 0;
 }