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| author | Seth Forshee <seth.forshee@canonical.com> | 2012-01-18 13:44:11 -0600 |
|---|---|---|
| committer | Matthew Garrett <mjg@redhat.com> | 2012-03-22 09:31:53 -0400 |
| commit | f11f999e989061952f1a27bd0c49645a46d13173 (patch) | |
| tree | 2e351b98cd900601b45c77af23740834f148703f /drivers/platform | |
| parent | af502837a08c8ca3495d3940d4c4eb4e19a3beaa (diff) | |
| download | lwn-f11f999e989061952f1a27bd0c49645a46d13173.tar.gz lwn-f11f999e989061952f1a27bd0c49645a46d13173.zip | |
toshiba_acpi: Refuse to load on machines with buggy INFO implementations
Several Satellite models have a buggy implementation of the INFO method
that causes ACPI exceptions when executed:
ACPI Error: Result stack is empty! State=ffff88012d70f800 (20110413/dswstate-98)
ACPI Exception: AE_AML_NO_RETURN_VALUE, Missing or null operand (20110413/dsutils-646)
ACPI Exception: AE_AML_NO_RETURN_VALUE, While creating Arg 0 (20110413/dsutils-763)
ACPI Error: Method parse/execution failed [\_SB_.VALZ.GETE] (Node ffff880131175eb0), AE_AML_NO_RETURN_VALUE (20110413/psparse-536)
ACPI Error: Method parse/execution failed [\_SB_.VALZ.INFO] (Node ffff880131175ed8), AE_AML_NO_RETURN_VALUE (20110413/psparse-536)
toshiba_acpi: ACPI INFO method execution failed
toshiba_acpi: Failed to query hotkey event
All known machines with this implementation also have a WMI interface
with event GUID 59142400-C6A3-40FA-BADB-8A2652834100 which is not seen
on any other models. Refuse to load toshiba_acpi on machines with this
guid.
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/x86/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/platform/x86/Makefile | 4 | ||||
| -rw-r--r-- | drivers/platform/x86/toshiba_acpi.c | 10 |
3 files changed, 15 insertions, 0 deletions
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 2efd7af2a21e..ce10f0313961 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -569,6 +569,7 @@ config TOPSTAR_LAPTOP config ACPI_TOSHIBA tristate "Toshiba Laptop Extras" depends on ACPI + depends on ACPI_WMI select LEDS_CLASS select NEW_LEDS depends on BACKLIGHT_CLASS_DEVICE diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index e072c3095915..dcfee6b2606d 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -30,7 +30,11 @@ obj-$(CONFIG_INTEL_MENLOW) += intel_menlow.o obj-$(CONFIG_ACPI_WMI) += wmi.o obj-$(CONFIG_MSI_WMI) += msi-wmi.o obj-$(CONFIG_TOPSTAR_LAPTOP) += topstar-laptop.o + +# toshiba_acpi must link after wmi to ensure that wmi devices are found +# before toshiba_acpi initializes obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o + obj-$(CONFIG_TOSHIBA_BT_RFKILL) += toshiba_bluetooth.o obj-$(CONFIG_INTEL_SCU_IPC) += intel_scu_ipc.o obj-$(CONFIG_INTEL_SCU_IPC_UTIL) += intel_scu_ipcutil.o diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c index e3e1fa6db004..ee79ce64d9df 100644 --- a/drivers/platform/x86/toshiba_acpi.c +++ b/drivers/platform/x86/toshiba_acpi.c @@ -63,6 +63,8 @@ MODULE_AUTHOR("John Belmonte"); MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver"); MODULE_LICENSE("GPL"); +#define TOSHIBA_WMI_EVENT_GUID "59142400-C6A3-40FA-BADB-8A2652834100" + /* Scan code for Fn key on TOS1900 models */ #define TOS1900_FN_SCAN 0x6e @@ -1249,6 +1251,14 @@ static int __init toshiba_acpi_init(void) { int ret; + /* + * Machines with this WMI guid aren't supported due to bugs in + * their AML. This check relies on wmi initializing before + * toshiba_acpi to guarantee guids have been identified. + */ + if (wmi_has_guid(TOSHIBA_WMI_EVENT_GUID)) + return -ENODEV; + toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir); if (!toshiba_proc_dir) { pr_err("Unable to create proc dir " PROC_TOSHIBA "\n"); |