diff options
| author |   Alexey Starikovskiy <astarikovskiy@suse.de> | 2007-11-21 03:23:32 +0300 |
|---|---|---|
| committer |   Len Brown <len.brown@intel.com> | 2007-11-20 20:06:15 -0500 |
| commit | e790cc8bbb990df900eabdda18a5a480d22a60c8 (patch) | |
| tree | 536d3bf16bb658817a1978bcc4270624f3661da0 /drivers/acpi/processor_core.c | |
| parent | ACPI: EC: use printk_ratelimit(), add some DEBUG mode messages (diff) | |
| download | linux-dev-e790cc8bbb990df900eabdda18a5a480d22a60c8.tar.xz linux-dev-e790cc8bbb990df900eabdda18a5a480d22a60c8.zip | |
ACPI: EC: Workaround for optimized controllers (version 3)
Some controllers fail to send confirmation GPE after address or data write.
Detect this and don't expect such confirmation in future.
This is a generalization of previous workaround
(66c5f4e7367b0085652931b2f3366de29e7ff5ec), which did only read address.
Reference: http://bugzilla.kernel.org/show_bug.cgi?id=9327
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Tested-by: Romano Giannetti <romano.giannetti@gmail.com>
Tested-by: Mats Johannesson
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/processor_core.c')
| -rw-r--r-- | drivers/acpi/processor_core.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c index 235a51e328c3..692b2a0a05b2 100644 --- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -684,7 +684,7 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) { struct acpi_processor *pr = data; struct acpi_device *device = NULL; - + int saved; if (!pr) return; @@ -694,7 +694,10 @@ static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) switch (event) { case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: + saved = pr->performance_platform_limit; acpi_processor_ppc_has_changed(pr); + if (saved == pr->performance_platform_limit) + break; acpi_bus_generate_proc_event(device, event, pr->performance_platform_limit); acpi_bus_generate_netlink_event(device->pnp.device_class, |