[PATCH 1/9] acpi: Use ACPI C-state type instead of enumeration value to export cpuidle state name
From: Thomas Renninger <hidden>
Date: 2011-01-07 10:31:38
Also in:
linux-acpi, lkml
Subsystem:
acpi, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
In the former /proc/acpi/processor/power/* there were Cx showing the enumerated number/amount of C-states and type[Cy] which is what should get shown as the cpuidle state name. Typically on latest Nehalem and later CPUs, BIOS vendors miss out C2 and C3 wrongly shows up as C2. Signed-off-by: Thomas Renninger <redacted> CC: arjan@linux.intel.com CC: lenb@kernel.org CC: linux-acpi@vger.kernel.org CC: linux-kernel@vger.kernel.org --- drivers/acpi/processor_idle.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index dcb38f8..104ae77 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c@@ -1008,7 +1008,6 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr) #endif cpuidle_set_statedata(state, cx); - snprintf(state->name, CPUIDLE_NAME_LEN, "C%d", i); strncpy(state->desc, cx->desc, CPUIDLE_DESC_LEN); state->exit_latency = cx->latency; state->target_residency = cx->latency * latency_factor;
@@ -1016,6 +1015,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr) state->flags = 0; switch (cx->type) { case ACPI_STATE_C1: + snprintf(state->name, CPUIDLE_NAME_LEN, "C1"); state->flags |= CPUIDLE_FLAG_SHALLOW; if (cx->entry_method == ACPI_CSTATE_FFH) state->flags |= CPUIDLE_FLAG_TIME_VALID;
@@ -1025,6 +1025,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr) break; case ACPI_STATE_C2: + snprintf(state->name, CPUIDLE_NAME_LEN, "C2"); state->flags |= CPUIDLE_FLAG_BALANCED; state->flags |= CPUIDLE_FLAG_TIME_VALID; state->enter = acpi_idle_enter_simple;
@@ -1032,6 +1033,7 @@ static int acpi_processor_setup_cpuidle(struct acpi_processor *pr) break; case ACPI_STATE_C3: + snprintf(state->name, CPUIDLE_NAME_LEN, "C3"); state->flags |= CPUIDLE_FLAG_DEEP; state->flags |= CPUIDLE_FLAG_TIME_VALID; state->flags |= CPUIDLE_FLAG_CHECK_BM;
--
1.7.3.1