linux-kernel - [PATCH 3/5] gpio: aggregator: Return an error if there are no GPIOs in gpio_aggregator

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Message-ID: <9dcd5fda7a3819e896d9eee4156e7c46c9a64595.1744452787.git.dan.carpenter@linaro.org>
Date: Sat, 12 Apr 2025 13:15:16 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Koichiro Den <koichiro.den@...onical.com>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>, linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] gpio: aggregator: Return an error if there are no GPIOs
 in gpio_aggregator_parse()

The error handling in gpio_aggregator_parse() was re-written.  It now
returns success if there are no GPIOs.  Restore the previous behavior
and return -EINVAL instead.

Fixes: 83c8e3df642f ("gpio: aggregator: expose aggregator created via legacy sysfs to configfs")
Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
---
 drivers/gpio/gpio-aggregator.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c
index e1b2efc0df99..62bb50af7cda 100644
--- a/drivers/gpio/gpio-aggregator.c
+++ b/drivers/gpio/gpio-aggregator.c
@@ -1128,6 +1128,7 @@ static int gpio_aggregator_parse(struct gpio_aggregator *aggr)
 
 	if (!n) {
 		pr_err("No GPIOs specified\n");
+		error = -EINVAL;
 		goto err;
 	}
 
-- 
2.47.2