[PATCH v2] gpio: mvebu: fix potential user-after-free on probe

[Baruch Siach]

When mvebu_pwm_probe() fails IRQ domain is not released. Goto the
err_domain label on failure to release IRQ domain.

Fixes: 757642f9a584 ("gpio: mvebu: Add limited PWM support")
Reported-by: Andrew Lunn <andrew at lunn.ch>
Signed-off-by: Baruch Siach <baruch at tkos.co.il>
---
v2: Don't leak pwm resources (Uwe Kleine-König)

This is split out of the "gpio: mvebu: Armada 8K/7K PWM support" series.
I'll rebase the series v2 on top on this fix.
---
 drivers/gpio/gpio-mvebu.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 433e2c3f3fd5..c53ed975a180 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -1255,8 +1255,11 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
 	}
 
 	/* Some MVEBU SoCs have simple PWM support for GPIO lines */
-	if (IS_ENABLED(CONFIG_PWM))
-		return mvebu_pwm_probe(pdev, mvchip, id);
+	if (IS_ENABLED(CONFIG_PWM)) {
+		err = mvebu_pwm_probe(pdev, mvchip, id);
+		if (err)
+			goto err_domain;
+	}
 
 	return 0;
 
-- 
2.29.2