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gpio: gpio-mm: Mask read inputs for get_multiple

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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 <linux@rasmusvillemoes.dk>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
William Breathitt Gray 2018-10-22 21:09:31 +09:00 • committed by Linus Walleij
parent b7f53f6798
commit 3bfbc44029
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-gpio-mm.c
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@ -211,7 +211,7 @@ static int gpiomm_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
port_state = inb(gpiommgpio->base + ports[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;