linux-kernel - [PATCH] pinctrl: bcm2835: Handle gpiochip_add_pin

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Date:   Sun, 16 Apr 2023 23:43:41 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Stefan Wahren <stefan.wahren@...e.com>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        linux-gpio@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH] pinctrl: bcm2835: Handle gpiochip_add_pin_range() errors

gpiochip_add_pin_range() can fail, so better return its error code than
a hard coded '0'.

Fixes: d2b67744fd99 ("pinctrl: bcm2835: implement hook for missing gpio-ranges")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
This patch is speculative and compile tested only.

If it is wrong, maybe a comment explaining why 0 should be returned would
be welcomed.
---
 drivers/pinctrl/bcm/pinctrl-bcm2835.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/bcm/pinctrl-bcm2835.c b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
index 8e2551a08c37..cb298fad354a 100644
--- a/drivers/pinctrl/bcm/pinctrl-bcm2835.c
+++ b/drivers/pinctrl/bcm/pinctrl-bcm2835.c
@@ -366,10 +366,8 @@ static int bcm2835_add_pin_ranges_fallback(struct gpio_chip *gc)
 	if (!pctldev)
 		return 0;
 
-	gpiochip_add_pin_range(gc, pinctrl_dev_get_devname(pctldev), 0, 0,
-			       gc->ngpio);
-
-	return 0;
+	return gpiochip_add_pin_range(gc, pinctrl_dev_get_devname(pctldev), 0, 0,
+				      gc->ngpio);
 }
 
 static const struct gpio_chip bcm2835_gpio_chip = {
-- 
2.34.1