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authorJohan Hovold <jhovold@gmail.com>2013-11-12 15:09:41 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 12:09:21 +0900
commitce726c9738a27ee32a00136cc512b1058044a0fe (patch)
tree57acdb0383364b683ffed7b224850283fe3bcd82 /drivers
parent5c057e5570f18b9d0f4eea99e0a0d55ad5f30e36 (diff)
downloadlinux-ce726c9738a27ee32a00136cc512b1058044a0fe.tar.bz2
backlight: atmel-pwm-bl: clean up probe error handling
Clean up probe error handling by checking parameters before any allocations and removing an obsolete error label. Also remove unnecessary reset of private gpio number. Signed-off-by: Johan Hovold <jhovold@gmail.com> Acked-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')
-rw-r--r--drivers/video/backlight/atmel-pwm-bl.c31
1 files changed, 12 insertions, 19 deletions
diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
index 4886028c9eaa..01af5c2d028a 100644
--- a/drivers/video/backlight/atmel-pwm-bl.c
+++ b/drivers/video/backlight/atmel-pwm-bl.c
@@ -126,40 +126,33 @@ static int atmel_pwm_bl_probe(struct platform_device *pdev)
struct atmel_pwm_bl *pwmbl;
int retval;
+ pdata = dev_get_platdata(&pdev->dev);
+ if (!pdata)
+ return -ENODEV;
+
+ if (pdata->pwm_compare_max < pdata->pwm_duty_max ||
+ pdata->pwm_duty_min > pdata->pwm_duty_max ||
+ pdata->pwm_frequency == 0)
+ return -EINVAL;
+
pwmbl = devm_kzalloc(&pdev->dev, sizeof(struct atmel_pwm_bl),
GFP_KERNEL);
if (!pwmbl)
return -ENOMEM;
pwmbl->pdev = pdev;
-
- pdata = dev_get_platdata(&pdev->dev);
- if (!pdata) {
- retval = -ENODEV;
- goto err_free_mem;
- }
-
- if (pdata->pwm_compare_max < pdata->pwm_duty_max ||
- pdata->pwm_duty_min > pdata->pwm_duty_max ||
- pdata->pwm_frequency == 0) {
- retval = -EINVAL;
- goto err_free_mem;
- }
-
pwmbl->pdata = pdata;
pwmbl->gpio_on = pdata->gpio_on;
retval = pwm_channel_alloc(pdata->pwm_channel, &pwmbl->pwmc);
if (retval)
- goto err_free_mem;
+ return retval;
if (pwmbl->gpio_on != -1) {
retval = devm_gpio_request(&pdev->dev, pwmbl->gpio_on,
"gpio_atmel_pwm_bl");
- if (retval) {
- pwmbl->gpio_on = -1;
+ if (retval)
goto err_free_pwm;
- }
/* Turn display off by default. */
retval = gpio_direction_output(pwmbl->gpio_on,
@@ -197,7 +190,7 @@ static int atmel_pwm_bl_probe(struct platform_device *pdev)
err_free_pwm:
pwm_channel_free(&pwmbl->pwmc);
-err_free_mem:
+
return retval;
}