[PATCH 6.19 817/844] gpio: nomadik: Add missing IS_ERR() check

[Sasha Levin]

From: Ethan Tidmore <ethantidmore06@xxxxxxxxx>

[ 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@xxxxxxxxxxxxxxx
Signed-off-by: Ethan Tidmore <ethantidmore06@xxxxxxxxx>
Link: https://patch.msgid.link/20260214044531.43539-1-ethantidmore06@xxxxxxxxx
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/gpio/gpio-nomadik.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpio/gpio-nomadik.c b/drivers/gpio/gpio-nomadik.c
index 97c5cd33279d5..e22b713166d71 100644
--- 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
-- 
2.51.0