diff options
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/thinkpad_acpi.c | 46 |
1 files changed, 29 insertions, 17 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c index 809ec8400ec5..344eb551c443 100644 --- a/drivers/misc/thinkpad_acpi.c +++ b/drivers/misc/thinkpad_acpi.c @@ -511,6 +511,8 @@ static int hotkey_orig_mask; static int __init hotkey_init(struct ibm_init_struct *iibm) { + int res; + vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n"); IBM_ACPIHANDLE_INIT(hkey); @@ -530,8 +532,9 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n", str_supported(tp_features.hotkey_mask)); - if (!hotkey_get(&hotkey_orig_status, &hotkey_orig_mask)) - return -ENODEV; + res = hotkey_get(&hotkey_orig_status, &hotkey_orig_mask); + if (res) + return res; } return (tp_features.hotkey)? 0 : 1; @@ -539,9 +542,13 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) static void hotkey_exit(void) { + int res; + if (tp_features.hotkey) { dbg_printk(TPACPI_DBG_EXIT, "restoring original hotkey mask\n"); - hotkey_set(hotkey_orig_status, hotkey_orig_mask); + res = hotkey_set(hotkey_orig_status, hotkey_orig_mask); + if (res) + printk(IBM_ERR "failed to restore hotkey to BIOS defaults\n"); } } @@ -560,13 +567,13 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event) static int hotkey_get(int *status, int *mask) { if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) - return 0; + return -EIO; if (tp_features.hotkey_mask) if (!acpi_evalf(hkey_handle, mask, "DHKN", "d")) - return 0; + return -EIO; - return 1; + return 0; } static int hotkey_set(int status, int mask) @@ -574,22 +581,22 @@ static int hotkey_set(int status, int mask) int i; if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status)) - return 0; + return -EIO; if (tp_features.hotkey_mask) for (i = 0; i < 32; i++) { int bit = ((1 << i) & mask) != 0; if (!acpi_evalf(hkey_handle, NULL, "MHKM", "vdd", i + 1, bit)) - return 0; + return -EIO; } - return 1; + return 0; } static int hotkey_read(char *p) { - int status, mask; + int res, status, mask; int len = 0; if (!tp_features.hotkey) { @@ -597,8 +604,9 @@ static int hotkey_read(char *p) return len; } - if (!hotkey_get(&status, &mask)) - return -EIO; + res = hotkey_get(&status, &mask); + if (res) + return res; len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0)); if (tp_features.hotkey_mask) { @@ -615,15 +623,16 @@ static int hotkey_read(char *p) static int hotkey_write(char *buf) { - int status, mask; + int res, status, mask; char *cmd; int do_cmd = 0; if (!tp_features.hotkey) return -ENODEV; - if (!hotkey_get(&status, &mask)) - return -EIO; + res = hotkey_get(&status, &mask); + if (res) + return res; while ((cmd = next_cmd(&buf))) { if (strlencmp(cmd, "enable") == 0) { @@ -642,8 +651,11 @@ static int hotkey_write(char *buf) do_cmd = 1; } - if (do_cmd && !hotkey_set(status, mask)) - return -EIO; + if (do_cmd) { + res = hotkey_set(status, mask); + if (res) + return res; + } return 0; } |