From: Srinivas Neeli <srinivas.neeli@xilinx.com>
Date: Thu, 21 Jul 2022 07:39:09 +0000 (+0530)
Subject: gpio: gpio-xilinx: Fix integer overflow
X-Git-Tag: v6.6.17~7035^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=32c094a09d5829ad9b02cdf667569aefa8de0ea6;p=platform%2Fkernel%2Flinux-rpi.git

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: 02b3f84d9080 ("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 b6d3a57e27ed..7f8e2fed2988 100644
--- 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)