From: William Breathitt Gray Date: Mon, 22 Oct 2018 12:09:49 +0000 (+0900) Subject: gpio: ws16c48: Mask read inputs for get_multiple X-Git-Tag: v5.0-rc1~103^2~49 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a702691d0ceb1a3a2199a1c7a15ddb5fbb50b7d;p=thirdparty%2Fkernel%2Flinux.git gpio: ws16c48: Mask read inputs for get_multiple This patch masks the read inputs with the word mask in order to ensure only requested input states are returned in the bits array. Suggested-by: Rasmus Villemoes Signed-off-by: William Breathitt Gray Signed-off-by: Linus Walleij --- diff --git a/drivers/gpio/gpio-ws16c48.c b/drivers/gpio/gpio-ws16c48.c index c7028eb0b8e11..5cf3697bfb152 100644 --- a/drivers/gpio/gpio-ws16c48.c +++ b/drivers/gpio/gpio-ws16c48.c @@ -169,7 +169,7 @@ static int ws16c48_gpio_get_multiple(struct gpio_chip *chip, port_state = inb(ws16c48gpio->base + i); /* store acquired bits at respective bits array offset */ - bits[word_index] |= port_state << word_offset; + bits[word_index] |= (port_state << word_offset) & word_mask; } return 0;