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authorJingoo Han <jg1.han@samsung.com>2013-02-21 16:43:23 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-02-21 17:22:22 -0800
commit892dc2e6603034188f51b30e702498a51d8c7365 (patch)
tree8b692ce179870f06ea0682587ba09edf741ffb1d /drivers/video
parent97a4d9d53a2c63706cb5bf222c37bf273939a7eb (diff)
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')
-rw-r--r--drivers/video/backlight/s6e63m0.c41
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);