gpio: gpio-xilinx: Fix integer overflow

Current implementation is not able to configure more than 32 pins
due to incorrect data type. So type casting with unsigned long
to avoid it.

Fixes: 82ccb7ab2a2b ("xilinx: Switch to use bitmap APIs")
Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index b6d3a57e27edc06b3ded115df1e676b7b5566975..7f8e2fed29884dca7330b9bc3961bbf8f0b40340 100644 (file)
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -99,7 +99,7 @@ static inline void xgpio_set_value32(unsigned long *map, int bit, u32 v)
        const unsigned long offset = (bit % BITS_PER_LONG) & BIT(5);
 
        map[index] &= ~(0xFFFFFFFFul << offset);
-       map[index] |= v << offset;
+       map[index] |= (unsigned long)v << offset;
 }
 
 static inline int xgpio_regoffset(struct xgpio_instance *chip, int ch)