From: Yazen Ghannam <yazen.ghan...@amd.com>
The ACPI idle driver will fallback to using the legacy P_LVL* SystemIO
method of entering C-states if the _CST method is disabled and P_BLK is
defined. However, in this case the C2 and C3 states won't have a
description set, so the user will see "<null>" when reading the
description from sysfs.
Give each of these states a description.
Signed-off-by: Yazen Ghannam <yazen.ghan...@amd.com>
---
drivers/acpi/processor_idle.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index b2131c4ea124..98d4ec5bf450 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -282,6 +282,13 @@ static int acpi_processor_get_power_info_fadt(struct
acpi_processor *pr)
pr->power.states[ACPI_STATE_C2].address,
pr->power.states[ACPI_STATE_C3].address));
+ snprintf(pr->power.states[ACPI_STATE_C2].desc,
+ ACPI_CX_DESC_LEN, "ACPI P_LVL2 IOPORT 0x%x",
+ pr->power.states[ACPI_STATE_C2].address);
+ snprintf(pr->power.states[ACPI_STATE_C3].desc,
+ ACPI_CX_DESC_LEN, "ACPI P_LVL3 IOPORT 0x%x",
+ pr->power.states[ACPI_STATE_C3].address);
+
return 0;
}
--
2.17.1
