linux-kernel - [PATCH] pinctrl: core: Set ret to 0 when group is skipped

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Date:   Fri, 12 Mar 2021 08:31:34 +0100
From:   Michal Simek <michal.simek@...inx.com>
To:     linux-kernel@...r.kernel.org, monstr@...str.eu,
        michal.simek@...inx.com, git@...inx.com,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     colin.king@...onical.com, dan.carpenter@...cle.com,
        linux-gpio@...r.kernel.org
Subject: [PATCH] pinctrl: core: Set ret to 0 when group is skipped

Static analyzer tool found that the ret variable is not initialized but
code expects ret value >=0 when pinconf is skipped in the first pinmux
loop. The same expectation is for pinmux in a pinconf loop.
That's why initialize ret to 0 to avoid uninitialized ret value in first
loop or reusing ret value from first loop in second.

Addresses-Coverity: ("Uninitialized variables")
Signed-off-by: Michal Simek <michal.simek@...inx.com>
CC: Colin Ian King <colin.king@...onical.com>
CC: Dan Carpenter <dan.carpenter@...cle.com>
---

 drivers/pinctrl/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pinctrl/core.c b/drivers/pinctrl/core.c
index f5c32d2a3c91..136c323d855e 100644
--- a/drivers/pinctrl/core.c
+++ b/drivers/pinctrl/core.c
@@ -1266,6 +1266,7 @@ static int pinctrl_commit_state(struct pinctrl *p, struct pinctrl_state *state)
 			break;
 		case PIN_MAP_TYPE_CONFIGS_PIN:
 		case PIN_MAP_TYPE_CONFIGS_GROUP:
+			ret = 0;
 			break;
 		default:
 			ret = -EINVAL;
@@ -1284,6 +1285,7 @@ static int pinctrl_commit_state(struct pinctrl *p, struct pinctrl_state *state)
 	list_for_each_entry(setting, &state->settings, node) {
 		switch (setting->type) {
 		case PIN_MAP_TYPE_MUX_GROUP:
+			ret = 0;
 			break;
 		case PIN_MAP_TYPE_CONFIGS_PIN:
 		case PIN_MAP_TYPE_CONFIGS_GROUP:
-- 
2.30.1