Input: evdev - signal that device is writable in evdev_poll()

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 70c0eb5..054edf3 100644 (file)
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -403,10 +403,15 @@ static unsigned int evdev_poll(struct file *file, poll_table *wait)
 {
        struct evdev_client *client = file->private_data;
        struct evdev *evdev = client->evdev;
+       unsigned int mask;
 
        poll_wait(file, &evdev->wait, wait);
-       return ((client->head == client->tail) ? 0 : (POLLIN | POLLRDNORM)) |
-               (evdev->exist ? 0 : (POLLHUP | POLLERR));
+
+       mask = evdev->exist ? POLLOUT | POLLWRNORM : POLLHUP | POLLERR;
+       if (client->head != client->tail)
+               mask |= POLLIN | POLLRDNORM;
+
+       return mask;
 }
 
 #ifdef CONFIG_COMPAT