diff options
Diffstat (limited to 'drivers/gpio/gpio-mb86s7x.c')
| -rw-r--r-- | drivers/gpio/gpio-mb86s7x.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-mb86s7x.c b/drivers/gpio/gpio-mb86s7x.c index 21b1ce5abdfe..ee93c0ab0a59 100644 --- a/drivers/gpio/gpio-mb86s7x.c +++ b/drivers/gpio/gpio-mb86s7x.c @@ -58,6 +58,11 @@ static int mb86s70_gpio_request(struct gpio_chip *gc, unsigned gpio) spin_lock_irqsave(&gchip->lock, flags); val = readl(gchip->base + PFR(gpio)); + if (!(val & OFFSET(gpio))) { + spin_unlock_irqrestore(&gchip->lock, flags); + return -EINVAL; + } + val &= ~OFFSET(gpio); writel(val, gchip->base + PFR(gpio)); |