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gpio: Fix wrong rounding in gpio-menz127

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[ Upstream commit 7279d99175 ]

men_z127_debounce() tries to round up and down, but uses functions which
are only suitable when the divider is a power of two, which is not the
case. Use the appropriate ones.

Found by static check. Compile tested.

Fixes: f436bc2726 ("gpio: add driver for MEN 16Z127 GPIO controller")
Signed-off-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nadav Amit
2018-06-04 06:58:14 -07:00
committed by Greg Kroah-Hartman
parent 5bcbbadf6a
commit de6ccdbd77
1 changed files with 2 additions and 2 deletions
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4
drivers/gpio/gpio-menz127.c
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@@ -56,9 +56,9 @@ static int men_z127_debounce(struct gpio_chip *gc, unsigned gpio,
rnd = fls(debounce) - 1;
if (rnd && (debounce & BIT(rnd - 1)))
debounce = round_up(debounce, MEN_Z127_DB_MIN_US);
debounce = roundup(debounce, MEN_Z127_DB_MIN_US);
else
debounce = round_down(debounce, MEN_Z127_DB_MIN_US);
debounce = rounddown(debounce, MEN_Z127_DB_MIN_US);
if (debounce > MEN_Z127_DB_MAX_US)
debounce = MEN_Z127_DB_MAX_US;