Input: rc-keymap - return KEY_RESERVED for unknown mappings

commit 54e74b87e2a9941c6fa82189f270b47cceeba714 upstream.

Do not respond with -EINVAL to EVIOCGKEYCODE for not-yet-mapped
scancodes, but rather return KEY_RESERVED.

This fixes breakage with Ubuntu's input-kbd utility that stopped
returning full keymaps for remote controls.

Tested-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Tested-by: Mark Lord <kernel@teksavvy.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/media/IR/ir-keytable.c b/drivers/media/IR/ir-keytable.c
index f60107c3b091b966895e48f6e1860112bbaa3482..c4645d7efb67ad6c48bd1066eef47535ec2cb826 100644 (file)
--- a/drivers/media/IR/ir-keytable.c
+++ b/drivers/media/IR/ir-keytable.c
@@ -374,21 +374,27 @@ static int ir_getkeycode(struct input_dev *dev,
                index = ir_lookup_by_scancode(rc_tab, scancode);
        }
 
-       if (index >= rc_tab->len) {
-               if (!(ke->flags & INPUT_KEYMAP_BY_INDEX))
-                       IR_dprintk(1, "unknown key for scancode 0x%04x\n",
-                                  scancode);
+       if (index < rc_tab->len) {
+               entry = &rc_tab->scan[index];
+
+               ke->index = index;
+               ke->keycode = entry->keycode;
+               ke->len = sizeof(entry->scancode);
+               memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode));
+
+       } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) {
+               /*
+                * We do not really know the valid range of scancodes
+                * so let's respond with KEY_RESERVED to anything we
+                * do not have mapping for [yet].
+                */
+               ke->index = index;
+               ke->keycode = KEY_RESERVED;
+       } else {
                retval = -EINVAL;
                goto out;
        }
 
-       entry = &rc_tab->scan[index];
-
-       ke->index = index;
-       ke->keycode = entry->keycode;
-       ke->len = sizeof(entry->scancode);
-       memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode));
-
        retval = 0;
 
 out: