linux-kernel - [PATCH 1/2] pinctrl: mediatek: Initialize variable pullen and pullup to zero

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Message-ID: <20230118062036.26258-2-Guodong.Liu@mediatek.com>
Date:   Wed, 18 Jan 2023 14:20:35 +0800
From:   Guodong Liu <Guodong.Liu@...iatek.com>
To:     Sean Wang <sean.wang@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Light Hsieh <light.hsieh@...iatek.com>,
        Rob Herring <robh@...nel.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
CC:     <linux-mediatek@...ts.infradead.org>, <linux-gpio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Zhiyong Tao <zhiyong.tao@...iatek.com>,
        Guodong Liu <Guodong.Liu@...iatek.com>
Subject: [PATCH 1/2] pinctrl: mediatek: Initialize variable pullen and pullup to zero

Coverity spotted that pullen and pullup is not initialized to zero in
mtk_pctrl_show_one_pin. The uninitialized variable pullen is used in
assignment statement "rsel = pullen;" in mtk_pctrl_show_one_pin, and
Uninitialized variable pullup is used when calling scnprintf. Fix this
coverity by initializing pullen and pullup as zero.

Fixes: 184d8e13f9b1 ("pinctrl: mediatek: Add support for pin configuration
dump via debugfs.")
Signed-off-by: Guodong Liu <Guodong.Liu@...iatek.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 f2ce3f626dd1..e736c1610f3c 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -635,7 +635,7 @@ static int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int
 ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
 	unsigned int gpio, char *buf, unsigned int buf_len)
 {
-	int pinmux, pullup, pullen, len = 0, r1 = -1, r0 = -1, rsel = -1;
+	int pinmux, pullup = 0, pullen = 0, len = 0, r1 = -1, r0 = -1, rsel = -1;
 	const struct mtk_pin_desc *desc;
 	u32 try_all_type = 0;
 
-- 
2.25.1