V4L/DVB (12600): dvb-usb-remote: return KEY_RESERVED if there's free space for new keys

The input subsystem checks if get_keycode works for a scan code. Due to that,
we need to return a valid value when there's some space at the table that
can be used by a scancode.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/media/dvb/dvb-usb/dvb-usb-remote.c b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
index b6dbc2b538d4..edde87c6aa3a 100644
--- a/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
+++ b/drivers/media/dvb/dvb-usb/dvb-usb-remote.c
@@ -22,6 +22,19 @@ static int dvb_usb_getkeycode(struct input_dev *dev,
                         *keycode = keymap[i].event;
                         return 0;
                 }
+
+        /*
+         * If is there extra space, returns KEY_RESERVED,
+         * otherwise, input core won't let dvb_usb_setkeycode
+         * to work
+         */
+        for (i = 0; i < d->props.rc_key_map_size; i++)
+                if (keymap[i].event == KEY_RESERVED ||
+                    keymap[i].event == KEY_UNKNOWN) {
+                        *keycode = KEY_RESERVED;
+                        return 0;
+                }
+
         return -EINVAL;
 }