From: Suraj Sonawane <surajsonawane0215@gmail.com>
Date: Sat, 26 Oct 2024 09:06:42 +0000 (+0530)
Subject: gpio: fix uninit-value in swnode_find_gpio
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a14968aea637bbe38a99e6089944e4ad8e6c49e5;p=users%2Fjedix%2Flinux-maple.git

gpio: fix uninit-value in swnode_find_gpio

Fix an issue detected by the Smatch tool:

drivers/gpio/gpiolib-swnode.c:78 swnode_find_gpio() error:
uninitialized symbol 'ret'.

The issue occurs because the 'ret' variable may be used without
initialization if the for_each_gpio_property_name loop does not run.
This could lead to returning an undefined value, causing unpredictable
behavior.

Initialize 'ret' to 0 before the loop to ensure the function
returns an error code if no properties are parsed, maintaining proper
error handling.

Fixes: 9e4c6c1ad ("Merge tag 'io_uring-6.12-20241011' of git://git.kernel.dk/linux")
Signed-off-by: Suraj Sonawane <surajsonawane0215@gmail.com>
Link: https://lore.kernel.org/r/20241026090642.28633-1-surajsonawane0215@gmail.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---

diff --git a/drivers/gpio/gpiolib-swnode.c b/drivers/gpio/gpiolib-swnode.c
index 2b2dd7e92211..51d2475c05c5 100644
--- a/drivers/gpio/gpiolib-swnode.c
+++ b/drivers/gpio/gpiolib-swnode.c
@@ -64,7 +64,7 @@ struct gpio_desc *swnode_find_gpio(struct fwnode_handle *fwnode,
 	struct fwnode_reference_args args;
 	struct gpio_desc *desc;
 	char propname[32]; /* 32 is max size of property name */
-	int ret;
+	int ret = 0;
 
 	swnode = to_software_node(fwnode);
 	if (!swnode)