drivers/ioexpander/gpio.c: Return EINVAL if written value is not 0 nor 1.

2019-03-22 07:10:57 -06:00 · 2019-03-22 07:10:57 -06:00 · 5bfa7a8df4
parent 46ba6bd6e3
commit 5bfa7a8df4
1 changed files with 4 additions and 0 deletions
--- a/drivers/ioexpander/gpio.c
+++ b/drivers/ioexpander/gpio.c
@ -251,6 +251,10 @@ static ssize_t gpio_write(FAR struct file *filep, FAR const char *buffer,
        {
          val = 1;
        }
+      else
+        {
+          return -EINVAL;
+        }

      /* Write the GPIO value */