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| author | Len Brown <len.brown@intel.com> | 2009-04-17 23:32:20 -0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-04-17 23:32:20 -0400 |
| commit | 96f15efcea94545987715f453a8c2b8ea592d000 (patch) | |
| tree | 9dac5a4547357e311cc2be960b799a91ae3ee15d /drivers/acpi/acpica | |
| parent | 0882e8dd3aad33eca41696d463bb896e6c8817eb (diff) | |
| download | linux-96f15efcea94545987715f453a8c2b8ea592d000.tar.gz linux-96f15efcea94545987715f453a8c2b8ea592d000.tar.bz2 linux-96f15efcea94545987715f453a8c2b8ea592d000.zip | |
ACPI: Disable _GTS and _BFS support by default
Executing BIOS code paths not exercised by Windows
tends to get Linux into trouble.
However, if a system does benefit from _GTS or _BFS,
acpi.gts=1 an acpi.bfs=1 are now available to enable them.
http://bugzilla.kernel.org/show_bug.cgi?id=13041
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica')
| -rw-r--r-- | drivers/acpi/acpica/hwsleep.c | 43 |
1 files changed, 26 insertions, 17 deletions
diff --git a/drivers/acpi/acpica/hwsleep.c b/drivers/acpi/acpica/hwsleep.c index baa5fc05e124..db307a356f08 100644 --- a/drivers/acpi/acpica/hwsleep.c +++ b/drivers/acpi/acpica/hwsleep.c @@ -211,6 +211,12 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state) ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep) +static unsigned int gts, bfs; +module_param(gts, uint, 0644); +module_param(bfs, uint, 0644); +MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend."); +MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".); + /******************************************************************************* * * FUNCTION: acpi_enter_sleep_state @@ -278,16 +284,18 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state) return_ACPI_STATUS(status); } - /* Execute the _GTS method */ + if (gts) { + /* Execute the _GTS method */ - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - arg.integer.value = sleep_state; + arg_list.count = 1; + arg_list.pointer = &arg; + arg.type = ACPI_TYPE_INTEGER; + arg.integer.value = sleep_state; - status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); - if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { - return_ACPI_STATUS(status); + status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { + return_ACPI_STATUS(status); + } } /* Get current value of PM1A control */ @@ -513,18 +521,19 @@ acpi_status acpi_leave_sleep_state_prep(u8 sleep_state) } } - /* Execute the _BFS method */ + if (bfs) { + /* Execute the _BFS method */ - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - arg.integer.value = sleep_state; + arg_list.count = 1; + arg_list.pointer = &arg; + arg.type = ACPI_TYPE_INTEGER; + arg.integer.value = sleep_state; - status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); - if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { - ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); + status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { + ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS")); + } } - return_ACPI_STATUS(status); } |