diff options
| author | Jingoo Han <jg1.han@samsung.com> | 2013-02-22 04:43:23 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-22 05:22:22 +0400 |
| commit | 892dc2e6603034188f51b30e702498a51d8c7365 (patch) | |
| tree | 8b692ce179870f06ea0682587ba09edf741ffb1d /drivers/video/backlight | |
| parent | 97a4d9d53a2c63706cb5bf222c37bf273939a7eb (diff) | |
| download | linux-892dc2e6603034188f51b30e702498a51d8c7365.tar.xz | |
backlight: s6e63m0: remove unnecessary NULL deference check
Remove unnecessary NULL deference check, because it was already checked in
s6e63m0_probe(). Also, POWER_IS_ON is replaced with
s6e63m0_power_is_on().
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/backlight')
| -rw-r--r-- | drivers/video/backlight/s6e63m0.c | 41 |
1 files changed, 14 insertions, 27 deletions
diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c index cff45152dee3..633f0d3fd6f7 100644 --- a/drivers/video/backlight/s6e63m0.c +++ b/drivers/video/backlight/s6e63m0.c @@ -43,8 +43,6 @@ #define MIN_BRIGHTNESS 0 #define MAX_BRIGHTNESS 10 -#define POWER_IS_ON(pwr) ((pwr) <= FB_BLANK_NORMAL) - struct s6e63m0 { struct device *dev; struct spi_device *spi; @@ -501,23 +499,19 @@ static int s6e63m0_ldi_disable(struct s6e63m0 *lcd) return ret; } +static int s6e63m0_power_is_on(int power) +{ + return power <= FB_BLANK_NORMAL; +} + static int s6e63m0_power_on(struct s6e63m0 *lcd) { int ret = 0; - struct lcd_platform_data *pd = NULL; - struct backlight_device *bd = NULL; + struct lcd_platform_data *pd; + struct backlight_device *bd; pd = lcd->lcd_pd; - if (!pd) { - dev_err(lcd->dev, "platform data is NULL.\n"); - return -EFAULT; - } - bd = lcd->bd; - if (!bd) { - dev_err(lcd->dev, "backlight device is NULL.\n"); - return -EFAULT; - } if (!pd->power_on) { dev_err(lcd->dev, "power_on is NULL.\n"); @@ -559,14 +553,10 @@ static int s6e63m0_power_on(struct s6e63m0 *lcd) static int s6e63m0_power_off(struct s6e63m0 *lcd) { - int ret = 0; - struct lcd_platform_data *pd = NULL; + int ret; + struct lcd_platform_data *pd; pd = lcd->lcd_pd; - if (!pd) { - dev_err(lcd->dev, "platform data is NULL.\n"); - return -EFAULT; - } ret = s6e63m0_ldi_disable(lcd); if (ret) { @@ -576,11 +566,7 @@ static int s6e63m0_power_off(struct s6e63m0 *lcd) msleep(pd->power_off_delay); - if (!pd->power_on) { - dev_err(lcd->dev, "power_on is NULL.\n"); - return -EFAULT; - } else - pd->power_on(lcd->ld, 0); + pd->power_on(lcd->ld, 0); return 0; } @@ -589,9 +575,9 @@ static int s6e63m0_power(struct s6e63m0 *lcd, int power) { int ret = 0; - if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power)) + if (s6e63m0_power_is_on(power) && !s6e63m0_power_is_on(lcd->power)) ret = s6e63m0_power_on(lcd); - else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power)) + else if (!s6e63m0_power_is_on(power) && s6e63m0_power_is_on(lcd->power)) ret = s6e63m0_power_off(lcd); if (!ret) @@ -812,8 +798,9 @@ static int s6e63m0_probe(struct spi_device *spi) lcd->power = FB_BLANK_POWERDOWN; s6e63m0_power(lcd, FB_BLANK_UNBLANK); - } else + } else { lcd->power = FB_BLANK_UNBLANK; + } dev_set_drvdata(&spi->dev, lcd); |