Input: evdev - if no events and non-block, return EAGAIN not 0

Signed-off-by: Dima Zavin <dima@android.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
git-mirror · Dec 30, 2011 · e90f869 · e90f869
1 parent 566cf5b
commit e90f869
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
@@ -412,6 +412,9 @@ static ssize_t evdev_read(struct file *file, char __user *buffer,
 		retval += input_event_size();
 	}
 
+	if (retval == 0 && (file->f_flags & O_NONBLOCK))
+		return -EAGAIN;
+
 	return retval;
 }