linux-kernel - [PATCH] pinctrl: mediatek: uninitialized variable in mtk_pctrl_show_one

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Message-ID: <20211127140750.GA24002@kili>
Date:   Sat, 27 Nov 2021 17:07:50 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Sean Wang <sean.wang@...nel.org>,
        Zhiyong Tao <zhiyong.tao@...iatek.com>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chen-Yu Tsai <wenst@...omium.org>,
        linux-mediatek@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH] pinctrl: mediatek: uninitialized variable in
 mtk_pctrl_show_one_pin()

The "try_all_type" variable is not set if (hw->soc->pull_type) is false
leading to the following Smatch warning:

    drivers/pinctrl/mediatek/pinctrl-paris.c:599 mtk_pctrl_show_one_pin()
    error: uninitialized symbol 'try_all_type'.

Fixes: fb34a9ae383a ("pinctrl: mediatek: support rsel feature")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/pinctrl/mediatek/pinctrl-paris.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index d4e02c5d74a8..4c6f6d967b18 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -581,7 +581,7 @@ ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
 {
 	int pinmux, pullup, pullen, len = 0, r1 = -1, r0 = -1, rsel = -1;
 	const struct mtk_pin_desc *desc;
-	u32 try_all_type;
+	u32 try_all_type = 0;
 
 	if (gpio >= hw->soc->npins)
 		return -EINVAL;
-- 
2.20.1