Check the HKEY firmware version (HKEY.MHKV handler), and refuse to load if
it is unknown. Use this instead of the presence of HKEY.DHKV to detect hot
key mask capability.
Signed-off-by: Henrique de Moraes Holschuh <hmh@xxxxxxxxxx>
---
drivers/misc/thinkpad_acpi.c | 28 +++++++++++++++++++++++-----
1 files changed, 23 insertions(+), 5 deletions(-)
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 2155139..9a61140 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -999,6 +999,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
int res, i;
int status;
+ int hkeyv;
vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
@@ -1024,18 +1025,35 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
return res;
/* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
- A30, R30, R31, T20-22, X20-21, X22-24 */
- tp_features.hotkey_mask =
- acpi_evalf(hkey_handle, NULL, "DHKN", "qv");
+ A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking
+ for HKEY interface version 0x100 */
+ if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
+ if ((hkeyv >> 8) != 1) {
+ printk(IBM_ERR "unknown version of the "
+ "HKEY interface: 0x%x\n", hkeyv);
+ printk(IBM_ERR "please report this to %s\n",
+ IBM_MAIL);
+ } else {
+ /*
+ * MHKV 0x100 in A31, R40, R40e,
+ * T4x, X31, and later
+ * */
+ tp_features.hotkey_mask = 1;
+ }
+ }
vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
str_supported(tp_features.hotkey_mask));
if (tp_features.hotkey_mask) {
- /* MHKA available in A31, R40, R40e, T4x, X31, and later */
if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
- "MHKA", "qd"))
+ "MHKA", "qd")) {
+ printk(IBM_ERR
+ "missing MHKA handler, "
+ "please report this to %s\n",
+ IBM_MAIL);
hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */
+ }
}
res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask);
--
1.5.3.1
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