[ARM] 5141/1: PWM: pwm_request() should return an PTR_ERR() instead of NULL.

Make the return of pwm_request() be more informative than just
being NULL on error by using PTR_ERR() to respond with an
approriate error.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 8346dfc01cf6..6338d0e2fe07 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -87,9 +87,9 @@ static int pwm_backlight_probe(struct platform_device *pdev)
         pb->notify = data->notify;
 
         pb->pwm = pwm_request(data->pwm_id, "backlight");
-        if (pb->pwm == NULL) {
+        if (IS_ERR(pb->pwm)) {
                 dev_err(&pdev->dev, "unable to request PWM for backlight\n");
-                ret = -EBUSY;
+                ret = PTR_ERR(pb->pwm);
                 goto err_pwm;
         }