1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index ce6f48c695f5..efbbbe48621a 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -461,10 +461,11 @@ static ssize_t ads7846_disable_store(struct device *dev,
                                      const char *buf, size_t count)
 {
         struct ads7846 *ts = dev_get_drvdata(dev);
-        char *endp;
-        int i;
+        long i;
+
+        if (strict_strtoul(buf, 10, &i))
+                return -EINVAL;
 
-        i = simple_strtoul(buf, &endp, 10);
         spin_lock_irq(&ts->lock);
 
         if (i)