Messages in this thread Patch in this message | | | From | Radim Krčmář <> | Subject | [PATCH] pvpanic: handle missing _STA correctly | Date | Fri, 29 May 2015 22:18:52 +0200 |
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pvpanic was not properly detected when _STA was missing.
ACPI 6.0 April 2015, 6.3.7 _STA (Status) If a device object (including the processor object) does not have an _STA object, then OSPM assumes that all of the above bits are set (i.e., the device is present, enabled, shown in the UI, and functioning).
Not adhering to the specification made pvpanic dormant under QEMU 2.3.
Suggested-by: Igor Mammedov <imammedo@redhat.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> --- drivers/platform/x86/pvpanic.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/platform/x86/pvpanic.c b/drivers/platform/x86/pvpanic.c index 073a90a63dbc..7b6860333267 100644 --- a/drivers/platform/x86/pvpanic.c +++ b/drivers/platform/x86/pvpanic.c @@ -95,8 +95,7 @@ static int pvpanic_add(struct acpi_device *device) acpi_status status; u64 ret; - status = acpi_evaluate_integer(device->handle, "_STA", NULL, - &ret); + status = acpi_bus_get_status_handle(device->handle, &ret); if (ACPI_FAILURE(status) || (ret & 0x0B) != 0x0B) return -ENODEV; -- 2.4.2
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