[PATCH 4.14 076/137] gpio: Fix wrong rounding in gpio-menz127

From: Greg Kroah-Hartman
Date: Tue Oct 02 2018 - 09:51:15 EST


4.14-stable review patch. If anyone has any objections, please let me know.

------------------

From: Nadav Amit <namit@xxxxxxxxxx>

[ Upstream commit 7279d9917560bbd0d82813d6bf00490a82c06783 ]

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: f436bc2726c64 ("gpio: add driver for MEN 16Z127 GPIO controller")
Signed-off-by: Nadav Amit <namit@xxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpio/gpio-menz127.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpio/gpio-menz127.c
+++ b/drivers/gpio/gpio-menz127.c
@@ -56,9 +56,9 @@ static int men_z127_debounce(struct 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;