diff options
| author | William Breathitt Gray <vilhelm.gray@gmail.com> | 2018-10-22 21:09:49 +0900 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2018-11-05 08:54:42 +0100 |
| commit | 7a702691d0ceb1a3a2199a1c7a15ddb5fbb50b7d (patch) | |
| tree | 33a0271ad92bb55428770510fa9dddb8dfd4a740 /drivers/gpio/gpio-ws16c48.c | |
| parent | 3bfbc44029926e1bc4b89d16f562a364b2c9379e (diff) | |
| download | lwn-7a702691d0ceb1a3a2199a1c7a15ddb5fbb50b7d.tar.gz lwn-7a702691d0ceb1a3a2199a1c7a15ddb5fbb50b7d.zip | |
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 <linux@rasmusvillemoes.dk>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-ws16c48.c')
| -rw-r--r-- | drivers/gpio/gpio-ws16c48.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-ws16c48.c b/drivers/gpio/gpio-ws16c48.c index c7028eb0b8e1..5cf3697bfb15 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; |