linux-kernel - [PATCH] gpio: aspeed: fix compile testing warning

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Date:   Mon,  9 Jul 2018 16:56:03 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Joel Stanley <joel@....id.au>
Cc:     Arnd Bergmann <arnd@...db.de>, Andrew Jeffery <andrew@...id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Thierry Reding <treding@...dia.com>,
        linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] gpio: aspeed: fix compile testing warning

Gcc cannot always see that BUG_ON(1) is guaranteed to not
return, so we get a warning message in some configurations:

drivers/gpio/gpio-aspeed.c: In function 'bank_reg':
drivers/gpio/gpio-aspeed.c:244:1: error: control reaches end of non-void function [-Werror=return-type]

Using a plain BUG() is easier here and avoids the problem.

Fixes: 44ddf559d579 ("gpio: aspeed: Rework register type accessors")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/gpio/gpio-aspeed.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c
index 1e00f4045f9d..2342e154029b 100644
--- a/drivers/gpio/gpio-aspeed.c
+++ b/drivers/gpio/gpio-aspeed.c
@@ -240,7 +240,7 @@ static inline void __iomem *bank_reg(struct aspeed_gpio *gpio,
 	case reg_cmdsrc1:
 		return gpio->base + bank->cmdsrc_regs + GPIO_CMDSRC_1;
 	}
-	BUG_ON(1);
+	BUG();
 }
 
 #define GPIO_BANK(x)	((x) >> 5)
-- 
2.9.0