diff options
Diffstat (limited to 'drivers/acpi/bus.c')
| -rw-r--r-- | drivers/acpi/bus.c | 53 |
1 files changed, 43 insertions, 10 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index ccae305ee55..e9b116d2b56 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -48,6 +48,23 @@ EXPORT_SYMBOL(acpi_root_dir); #define STRUCT_TO_INT(s) (*((int*)&s)) +static int set_power_nocheck(const struct dmi_system_id *id) +{ + printk(KERN_NOTICE PREFIX "%s detected - " + "disable power check in power transistion\n", id->ident); + acpi_power_nocheck = 1; + return 0; +} +static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = { + { + set_power_nocheck, "HP Pavilion 05", { + DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), + DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"), + DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL}, + {}, +}; + + /* -------------------------------------------------------------------------- Device Management -------------------------------------------------------------------------- */ @@ -95,21 +112,21 @@ int acpi_bus_get_status(struct acpi_device *device) } /* - * Otherwise we assume the status of our parent (unless we don't - * have one, in which case status is implied). + * According to ACPI spec some device can be present and functional + * even if the parent is not present but functional. + * In such conditions the child device should not inherit the status + * from the parent. */ - else if (device->parent) - device->status = device->parent->status; else STRUCT_TO_INT(device->status) = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; if (device->status.functional && !device->status.present) { - printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: " - "functional but not present; setting present\n", - device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status)); - device->status.present = 1; + ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " + "functional but not present;\n", + device->pnp.bus_id, + (u32) STRUCT_TO_INT(device->status))); } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", @@ -223,7 +240,19 @@ int acpi_bus_set_power(acpi_handle handle, int state) /* * Get device's current power state */ - acpi_bus_get_power(device->handle, &device->power.state); + if (!acpi_power_nocheck) { + /* + * Maybe the incorrect power state is returned on the bogus + * bios, which is different with the real power state. + * For example: the bios returns D0 state and the real power + * state is D3. OS expects to set the device to D0 state. In + * such case if OS uses the power state returned by the BIOS, + * the device can't be transisted to the correct power state. + * So if the acpi_power_nocheck is set, it is unnecessary to + * get the power state by calling acpi_bus_get_power. + */ + acpi_bus_get_power(device->handle, &device->power.state); + } if ((state == device->power.state) && !device->flags.force_power_state) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n", state)); @@ -818,7 +847,11 @@ static int __init acpi_init(void) } } else disable_acpi(); - + /* + * If the laptop falls into the DMI check table, the power state check + * will be disabled in the course of device power transistion. + */ + dmi_check_system(power_nocheck_dmi_table); return result; } |