| From foo@baz Mon Apr 9 17:09:24 CEST 2018 |
| From: Lv Zheng <lv.zheng@intel.com> |
| Date: Mon, 5 Jun 2017 16:40:02 +0800 |
| Subject: ACPICA: Events: Add runtime stub support for event APIs |
| |
| From: Lv Zheng <lv.zheng@intel.com> |
| |
| |
| [ Upstream commit 861ba6351c520328e94a78c923b415faa9116287 ] |
| |
| ACPICA commit 99bc3beca92c6574ea1d69de42e54f872e6373ce |
| |
| It is reported that on Linux, RTC driver complains wrong errors on |
| hardware reduced platform: |
| [ 4.085420] ACPI Warning: Could not enable fixed event - real_time_clock (4) (20160422/evxface-654) |
| |
| This patch fixes this by correctly adding runtime reduced hardware check. |
| Reported by Chandan Tagore, fixed by Lv Zheng. |
| |
| Link: https://github.com/acpica/acpica/commit/99bc3bec |
| Tested-by: Chandan Tagore <tagore.chandan@gmail.com> |
| Signed-off-by: Lv Zheng <lv.zheng@intel.com> |
| Signed-off-by: Bob Moore <robert.moore@intel.com> |
| Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
| Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| --- |
| drivers/acpi/acpica/evxfevnt.c | 18 ++++++++++++++++++ |
| 1 file changed, 18 insertions(+) |
| |
| --- a/drivers/acpi/acpica/evxfevnt.c |
| +++ b/drivers/acpi/acpica/evxfevnt.c |
| @@ -180,6 +180,12 @@ acpi_status acpi_enable_event(u32 event, |
| |
| ACPI_FUNCTION_TRACE(acpi_enable_event); |
| |
| + /* If Hardware Reduced flag is set, there are no fixed events */ |
| + |
| + if (acpi_gbl_reduced_hardware) { |
| + return_ACPI_STATUS(AE_OK); |
| + } |
| + |
| /* Decode the Fixed Event */ |
| |
| if (event > ACPI_EVENT_MAX) { |
| @@ -237,6 +243,12 @@ acpi_status acpi_disable_event(u32 event |
| |
| ACPI_FUNCTION_TRACE(acpi_disable_event); |
| |
| + /* If Hardware Reduced flag is set, there are no fixed events */ |
| + |
| + if (acpi_gbl_reduced_hardware) { |
| + return_ACPI_STATUS(AE_OK); |
| + } |
| + |
| /* Decode the Fixed Event */ |
| |
| if (event > ACPI_EVENT_MAX) { |
| @@ -290,6 +302,12 @@ acpi_status acpi_clear_event(u32 event) |
| |
| ACPI_FUNCTION_TRACE(acpi_clear_event); |
| |
| + /* If Hardware Reduced flag is set, there are no fixed events */ |
| + |
| + if (acpi_gbl_reduced_hardware) { |
| + return_ACPI_STATUS(AE_OK); |
| + } |
| + |
| /* Decode the Fixed Event */ |
| |
| if (event > ACPI_EVENT_MAX) { |