From e0a8604f1300cefab4aeafe214fc57954a7b4487 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 11 Mar 2016 17:31:27 +0100 Subject: [PATCH] gpio: pca953x: Fix pca953x_gpio_set_multiple() on 64-bit pca953x_gpio_set_multiple() divides by 4 to convert from longs to bytes, which assumes a 32-bit platform, and is not correct on 64-bit platforms. Use "sizeof(...)" instead to fix this. Cc: stable@vger.kernel.org Fixes: b4818afeacbd8182 ("gpio: pca953x: Add set_multiple to allow multiple bits to be set in one write.") Signed-off-by: Geert Uytterhoeven Acked-by: Phil Reid Signed-off-by: Linus Walleij --- drivers/gpio/gpio-pca953x.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index b7fe5d5e3488..d0d3065a7557 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -367,9 +367,11 @@ static void pca953x_gpio_set_multiple(struct gpio_chip *gc, memcpy(reg_val, chip->reg_output, NBANK(chip)); mutex_lock(&chip->i2c_lock); for(bank=0; bank> ((bank % 4) * 8); + unsigned bankmask = mask[bank / sizeof(*mask)] >> + ((bank % sizeof(*mask)) * 8); if(bankmask) { - unsigned bankval = bits[bank/4] >> ((bank % 4) * 8); + unsigned bankval = bits[bank / sizeof(*bits)] >> + ((bank % sizeof(*bits)) * 8); reg_val[bank] = (reg_val[bank] & ~bankmask) | bankval; } } -- 2.20.1