backlight: tdo24m: 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>

diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c
index 2368b8e..02444d0 100644 (file)
--- a/drivers/video/backlight/tdo24m.c
+++ b/drivers/video/backlight/tdo24m.c
@@ -349,7 +349,7 @@ static int __devinit tdo24m_probe(struct spi_device *spi)
        if (err)
                return err;
 
-       lcd = kzalloc(sizeof(struct tdo24m), GFP_KERNEL);
+       lcd = devm_kzalloc(&spi->dev, sizeof(struct tdo24m), GFP_KERNEL);
        if (!lcd)
                return -ENOMEM;
 
@@ -357,11 +357,9 @@ static int __devinit tdo24m_probe(struct spi_device *spi)
        lcd->power = FB_BLANK_POWERDOWN;
        lcd->mode = MODE_VGA;   /* default to VGA */
 
-       lcd->buf = kmalloc(TDO24M_SPI_BUFF_SIZE, GFP_KERNEL);
-       if (lcd->buf == NULL) {
-               kfree(lcd);
+       lcd->buf = devm_kzalloc(&spi->dev, TDO24M_SPI_BUFF_SIZE, GFP_KERNEL);
+       if (lcd->buf == NULL)
                return -ENOMEM;
-       }
 
        m = &lcd->msg;
        x = &lcd->xfer;
@@ -383,15 +381,13 @@ static int __devinit tdo24m_probe(struct spi_device *spi)
                break;
        default:
                dev_err(&spi->dev, "Unsupported model");
-               goto out_free;
+               return -EINVAL;
        }
 
        lcd->lcd_dev = lcd_device_register("tdo24m", &spi->dev,
                                        lcd, &tdo24m_ops);
-       if (IS_ERR(lcd->lcd_dev)) {
-               err = PTR_ERR(lcd->lcd_dev);
-               goto out_free;
-       }
+       if (IS_ERR(lcd->lcd_dev))
+               return PTR_ERR(lcd->lcd_dev);
 
        dev_set_drvdata(&spi->dev, lcd);
        err = tdo24m_power(lcd, FB_BLANK_UNBLANK);
@@ -402,9 +398,6 @@ static int __devinit tdo24m_probe(struct spi_device *spi)
 
 out_unregister:
        lcd_device_unregister(lcd->lcd_dev);
-out_free:
-       kfree(lcd->buf);
-       kfree(lcd);
        return err;
 }
 
@@ -414,8 +407,6 @@ static int __devexit tdo24m_remove(struct spi_device *spi)
 
        tdo24m_power(lcd, FB_BLANK_POWERDOWN);
        lcd_device_unregister(lcd->lcd_dev);
-       kfree(lcd->buf);
-       kfree(lcd);
 
        return 0;
 }