pwm: Fix device reference leak

Make sure to drop the reference to the parent device taken by class_find_device() after "unexporting" any children when deregistering a PWM chip. Fixes: 0733424 ("pwm: Unexport children before chip removal") Signed-off-by: Johan Hovold <[email protected]> Signed-off-by: Thierry Reding <[email protected]>
laijs · Nov 29, 2016 · 0e1614a · 0e1614a
1 parent c699995
commit 0e1614a
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c
@@ -425,6 +425,8 @@ void pwmchip_sysfs_unexport_children(struct pwm_chip *chip)
 		if (test_bit(PWMF_EXPORTED, &pwm->flags))
 			pwm_unexport_child(parent, pwm);
 	}
+
+	put_device(parent);
 }
 
 static int __init pwm_sysfs_init(void)