gpio: nomadik: Add missing IS_ERR() check

[ Upstream commit 58433885ee99e8c96757e82ccf6d50646c4dfe09 ]

The function gpio_device_get_desc() can return an error pointer and is
not checked for one. Add check for error pointer.

Fixes: ddeb66d2cb10f ("gpio: nomadik: don't print out global GPIO numbers in debugfs callbacks")
Cc: stable@vger.kernel.org
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Link: https://patch.msgid.link/20260214044531.43539-1-ethantidmore06@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c
index 97c5cd33279d561c56ea508e3970566da02a5d6d..e22b713166d71d9160d8bddb932f26f4a158e672 100644 (file)
--- a/drivers/gpio/gpio-nomadik.c
+++ b/drivers/gpio/gpio-nomadik.c
@@ -430,6 +430,9 @@ void nmk_gpio_dbg_show_one(struct seq_file *s, struct pinctrl_dev *pctldev,
 #ifdef CONFIG_PINCTRL_NOMADIK
        if (mode == NMK_GPIO_ALT_C && pctldev) {
                desc = gpio_device_get_desc(chip->gpiodev, offset);
+               if (IS_ERR(desc))
+                       return;
+
                mode = nmk_prcm_gpiocr_get_mode(pctldev, desc_to_gpio(desc));
        }
 #endif