linux-kernel - [PATCH] gpiolib: Fix missing array end sentinel in quirks array

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Date:   Tue, 20 Sep 2022 16:27:18 +0200
From:   Nicolas Frattaroli <frattaroli.nicolas@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Nicolas Frattaroli <frattaroli.nicolas@...il.com>,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] gpiolib: Fix missing array end sentinel in quirks array

Without the sentinel, the loop never actually terminates if there
are no quirks, and wreaks havoc across the kernel resulting in a
juicy panic.

Fix this by adding a NULL at the end.

Fixes: a2b5e207cade ("gpiolib: rework quirk handling in of_find_gpio()")
Signed-off-by: Nicolas Frattaroli <frattaroli.nicolas@...il.com>
---
 drivers/gpio/gpiolib-of.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index 95be5f0d2623..1b60cd04883f 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -498,6 +498,7 @@ static const of_find_gpio_quirk of_find_gpio_quirks[] = {
 	of_find_regulator_gpio,
 	of_find_arizona_gpio,
 	of_find_usb_gpio,
+	NULL,
 };
 
 struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
-- 
2.37.3