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gpio: pci-idio-16: 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 <linux@rasmusvillemoes.dk>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
William Breathitt Gray 2018-10-22 21:10:06 +09:00 committed by Linus Walleij
parent 7a702691d0
commit f837bf6aca
1 changed files with 1 additions and 1 deletions
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2
drivers/gpio/gpio-pci-idio-16.c
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@ -146,7 +146,7 @@ static int idio_16_gpio_get_multiple(struct gpio_chip *chip,
port_state = ioread8(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;