diff options
| author | Karol Kozimor <sziwan@hell.org.pl> | 2005-12-22 12:42:00 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2005-12-29 02:41:54 -0500 |
| commit | b697b5372ecfe0c57ee26e0c3787fc2306109228 (patch) | |
| tree | be486f634f5ad008d2412b6c039d7481991e5168 /drivers/acpi | |
| parent | 3603bc8dc5ab33941e6378fe52ea03b7f5561109 (diff) | |
| download | linux-b697b5372ecfe0c57ee26e0c3787fc2306109228.tar.bz2 | |
[ASUS_ACPI] work around Samsung P30s oops
The code used to rely on a certain method to return a NULL buffer, which
is now hardly possible with the implicit return code on by default. This
sort of fixes bugs #5067 and #5092 for now.
Note: this patch makes the driver unusable on said machines (and on said
machines only) iff acpi=strict is specified, but it seems noone really uses
that.
Signed-off-by: Karol Kozimor <sziwan@hell.org.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/asus_acpi.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/drivers/acpi/asus_acpi.c b/drivers/acpi/asus_acpi.c index fec895af6ae6..582995ef9f34 100644 --- a/drivers/acpi/asus_acpi.c +++ b/drivers/acpi/asus_acpi.c @@ -987,9 +987,21 @@ static int __init asus_hotk_get_info(void) printk(KERN_NOTICE " BSTS called, 0x%02x returned\n", bsts_result); - /* Samsung P30 has a device with a valid _HID whose INIT does not - * return anything. Catch this one and any similar here */ - if (buffer.pointer == NULL) { + /* This is unlikely with implicit return */ + if (buffer.pointer == NULL) + return -EINVAL; + + model = (union acpi_object *) buffer.pointer; + /* + * Samsung P30 has a device with a valid _HID whose INIT does not + * return anything. It used to be possible to catch this exception, + * but the implicit return code will now happily confuse the + * driver. We assume that every ACPI_TYPE_STRING is a valid model + * identifier but it's still possible to get completely bogus data. + */ + if (model->type == ACPI_TYPE_STRING) { + printk(KERN_NOTICE " %s model detected, ", model->string.pointer); + } else { if (asus_info && /* Samsung P30 */ strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) { hotk->model = P30; @@ -1002,13 +1014,10 @@ static int __init asus_hotk_get_info(void) "the developers with your DSDT\n"); } hotk->methods = &model_conf[hotk->model]; - return AE_OK; - } + + acpi_os_free(model); - model = (union acpi_object *)buffer.pointer; - if (model->type == ACPI_TYPE_STRING) { - printk(KERN_NOTICE " %s model detected, ", - model->string.pointer); + return AE_OK; } hotk->model = END_MODEL; |