linux-kernel - [PATCH] pinctrl: actions: Fix uninitialized error in owl_pin_config

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Date:   Fri,  8 Jun 2018 12:05:47 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        Andreas Färber <afaerber@...e.de>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH] pinctrl: actions: Fix uninitialized error in owl_pin_config_set()

With gcc 4.1.2:

    drivers/pinctrl/actions/pinctrl-owl.c: In function ‘owl_pin_config_set’:
    drivers/pinctrl/actions/pinctrl-owl.c:336: warning: ‘ret’ may be used uninitialized in this function

Indeed, if num_configs is zero, the uninitialized value will be returned
as an error code.

Fix this by preinitializing it to zero.

Fixes: 2242ddfbf4d699b5 ("pinctrl: actions: Add Actions S900 pinctrl driver")
Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
 drivers/pinctrl/actions/pinctrl-owl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/actions/pinctrl-owl.c b/drivers/pinctrl/actions/pinctrl-owl.c
index 76243caa08c630c0..b5c880b50bb371f5 100644
--- a/drivers/pinctrl/actions/pinctrl-owl.c
+++ b/drivers/pinctrl/actions/pinctrl-owl.c
@@ -333,7 +333,7 @@ static int owl_pin_config_set(struct pinctrl_dev *pctrldev,
 	unsigned long flags;
 	unsigned int param;
 	u32 reg, bit, width, arg;
-	int ret, i;
+	int ret = 0, i;
 
 	info = &pctrl->soc->padinfo[pin];
 
-- 
2.7.4