linux-kernel - [PATCH] gpiolib: use gpiochip_get

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Message-Id: <20200219094702.6463-1-brgl@bgdev.pl>
Date:   Wed, 19 Feb 2020 10:47:02 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH] gpiolib: use gpiochip_get_desc() where applicable

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Whenever retrieving a descriptor from a gpiochip: use the provided
helper which checks for errors.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 drivers/gpio/gpiolib.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 4d0106ceeba7..5c761a738065 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2953,7 +2953,9 @@ const char *gpiochip_is_requested(struct gpio_chip *chip, unsigned offset)
 	if (offset >= chip->ngpio)
 		return NULL;
 
-	desc = &chip->gpiodev->descs[offset];
+	desc = gpiochip_get_desc(chip, offset);
+	if (IS_ERR(desc))
+		return NULL;
 
 	if (test_bit(FLAG_REQUESTED, &desc->flags) == 0)
 		return NULL;
-- 
2.25.0