1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/gpio/langwell_gpio.c b/drivers/gpio/langwell_gpio.c
index 4baf3d7d0f8e..00c3a14127af 100644
--- a/drivers/gpio/langwell_gpio.c
+++ b/drivers/gpio/langwell_gpio.c
@@ -29,6 +29,7 @@
 #include <linux/irq.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
+#include <linux/slab.h>
 
 struct lnw_gpio_register {
         u32     GPLR[2];
@@ -123,7 +124,7 @@ static int lnw_irq_type(unsigned irq, unsigned type)
         void __iomem *grer = (void __iomem *)(&lnw->reg_base->GRER[reg]);
         void __iomem *gfer = (void __iomem *)(&lnw->reg_base->GFER[reg]);
 
-        if (gpio < 0 || gpio > lnw->chip.ngpio)
+        if (gpio >= lnw->chip.ngpio)
                 return -EINVAL;
         spin_lock_irqsave(&lnw->lock, flags);
         if (type & IRQ_TYPE_EDGE_RISING)