pwm: ab8500: use devm_kzalloc()

Use devm_kzalloc() to make cleanup paths more simple.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>

drivers/pwm/pwm-ab8500.c

@@ -99,7 +99,7 @@ static int ab8500_pwm_probe(struct platform_device *pdev)
 	 * Nothing to be done in probe, this is required to get the
 	 * device which is required for ab8500 read and write
 	 */
-	ab8500 = kzalloc(sizeof(*ab8500), GFP_KERNEL);
+	ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
 	if (ab8500 == NULL) {
 		dev_err(&pdev->dev, "failed to allocate memory\n");
 		return -ENOMEM;
@@ -111,10 +111,8 @@ static int ab8500_pwm_probe(struct platform_device *pdev)
 	ab8500->chip.npwm = 1;
 
 	err = pwmchip_add(&ab8500->chip);
-	if (err < 0) {
-		kfree(ab8500);
+	if (err < 0)
 		return err;
-	}
 
 	dev_dbg(&pdev->dev, "pwm probe successful\n");
 	platform_set_drvdata(pdev, ab8500);
@@ -132,7 +130,6 @@ static int ab8500_pwm_remove(struct platform_device *pdev)
 		return err;
 
 	dev_dbg(&pdev->dev, "pwm driver removed\n");
-	kfree(ab8500);
 
 	return 0;
 }