diff options
| -rw-r--r-- | drivers/platform/x86/dell-wmi.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c index ad6e965c5862..57402c4c394e 100644 --- a/drivers/platform/x86/dell-wmi.c +++ b/drivers/platform/x86/dell-wmi.c @@ -118,6 +118,7 @@ struct dell_bios_hotkey_table { static const struct dell_bios_hotkey_table *dell_bios_hotkey_table; +/* Uninitialized entries here are KEY_RESERVED == 0. */ static const u16 bios_to_linux_keycode[256] __initconst = { [0] = KEY_MEDIA, [1] = KEY_NEXTSONG, @@ -170,7 +171,8 @@ static void dell_wmi_process_key(int reported_key) key = sparse_keymap_entry_from_scancode(dell_wmi_input_dev, reported_key); if (!key) { - pr_info("Unknown key %x pressed\n", reported_key); + pr_info("Unknown key with scancode 0x%x pressed\n", + reported_key); return; } @@ -328,9 +330,23 @@ static const struct key_entry * __init dell_wmi_prepare_new_keymap(void) for (i = 0; i < hotkey_num; i++) { const struct dell_bios_keymap_entry *bios_entry = &dell_bios_hotkey_table->keymap[i]; - u16 keycode = bios_entry->keycode < 256 ? - bios_to_linux_keycode[bios_entry->keycode] : - KEY_RESERVED; + + /* Uninitialized entries are 0 aka KEY_RESERVED. */ + u16 keycode = (bios_entry->keycode < + ARRAY_SIZE(bios_to_linux_keycode)) ? + bios_to_linux_keycode[bios_entry->keycode] : + KEY_RESERVED; + + /* + * Log if we find an entry in the DMI table that we don't + * understand. If this happens, we should figure out what + * the entry means and add it to bios_to_linux_keycode. + */ + if (keycode == KEY_RESERVED) { + pr_info("firmware scancode 0x%x maps to unrecognized keycode 0x%x\n", + bios_entry->scancode, bios_entry->keycode); + continue; + } if (keycode == KEY_KBDILLUMTOGGLE) keymap[i].type = KE_IGNORE; |