backlight: ams369fg06: remove unnecessary NULL deference check

Remove unnecessary NULL deference check, because it was already checked in
ams369fg06_probe().  Also, unnecessary parentheses are removed in
ams369fg06_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>

drivers/video/backlight/ams369fg06.c

@@ -314,26 +314,17 @@ static int ams369fg06_ldi_disable(struct ams369fg06 *lcd)
 
 static int ams369fg06_power_is_on(int power)
 {
-	return ((power) <= FB_BLANK_NORMAL);
+	return power <= FB_BLANK_NORMAL;
 }
 
 static int ams369fg06_power_on(struct ams369fg06 *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");
@@ -375,14 +366,10 @@ static int ams369fg06_power_on(struct ams369fg06 *lcd)
 
 static int ams369fg06_power_off(struct ams369fg06 *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 = ams369fg06_ldi_disable(lcd);
 	if (ret) {
@@ -392,11 +379,7 @@ static int ams369fg06_power_off(struct ams369fg06 *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;
 }
@@ -535,8 +518,9 @@ static int ams369fg06_probe(struct spi_device *spi)
 		lcd->power = FB_BLANK_POWERDOWN;
 
 		ams369fg06_power(lcd, FB_BLANK_UNBLANK);
-	} else
+	} else {
 		lcd->power = FB_BLANK_UNBLANK;
+	}
 
 	dev_set_drvdata(&spi->dev, lcd);