diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2016-03-11 17:31:27 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-03-16 13:03:14 +0100 |
| commit | e0a8604f1300cefab4aeafe214fc57954a7b4487 (patch) | |
| tree | a05f0d32f515ebcd9ba1fd00d498d0123707f805 /drivers/gpio | |
| parent | e5f7e3121429c7b1ce6d759150b5bf936ddd2080 (diff) | |
| download | linux-e0a8604f1300cefab4aeafe214fc57954a7b4487.tar.gz linux-e0a8604f1300cefab4aeafe214fc57954a7b4487.tar.bz2 linux-e0a8604f1300cefab4aeafe214fc57954a7b4487.zip | |
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 <geert+renesas@glider.be>
Acked-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 6 |
1 files 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<NBANK(chip); bank++) { - unsigned bankmask = mask[bank/4] >> ((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; } } |