"val" can be negative, so we'd write before the start of the
par->gpio.db[] array.
Fixes: c296d5f9957c ("staging: fbtft: core support")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c
index b742ee786615..6d0363deba61 100644
--- a/drivers/staging/fbtft/fbtft-core.c
+++ b/drivers/staging/fbtft/fbtft-core.c
@@ -84,7 +84,7 @@ static unsigned long fbtft_request_gpios_match(struct fbtft_par *par,
const struct fbtft_gpio *gpio)
{
int ret;
- long val;
+ unsigned int val;
fbtft_par_dbg(DEBUG_REQUEST_GPIOS_MATCH, par, "%s('%s')\n",
__func__, gpio->name);
@@ -108,7 +108,7 @@ static unsigned long fbtft_request_gpios_match(struct fbtft_par *par,
par->gpio.latch = gpio->gpio;
return GPIOF_OUT_INIT_LOW;
} else if (gpio->name[0] == 'd' && gpio->name[1] == 'b') {
- ret = kstrtol(&gpio->name[2], 10, &val);
+ ret = kstrtouint(&gpio->name[2], 10, &val);
if (ret == 0 && val < 16) {
par->gpio.db[val] = gpio->gpio;
return GPIOF_OUT_INIT_LOW;
--
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