diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c
index 39838c66603265bd188f398b07fdd494a0699589..31adda1099e0d451f68ef399b8f8c0f5832f21c5 100644
--- a/drivers/acpi/processor_thermal.c
+++ b/drivers/acpi/processor_thermal.c
@@ -66,7 +66,7 @@ static int acpi_processor_apply_limit(struct acpi_processor *pr)
if (pr->limit.thermal.tx > tx)
tx = pr->limit.thermal.tx;
- result = acpi_processor_set_throttling(pr, tx);
+ result = acpi_processor_set_throttling(pr, tx, false);
if (result)
goto end;
}
@@ -421,12 +421,12 @@ processor_set_cur_state(struct thermal_cooling_device *cdev,
if (state <= max_pstate) {
if (pr->flags.throttling && pr->throttling.state)
- result = acpi_processor_set_throttling(pr, 0);
+ result = acpi_processor_set_throttling(pr, 0, false);
cpufreq_set_cur_state(pr->id, state);
} else {
cpufreq_set_cur_state(pr->id, max_pstate);
result = acpi_processor_set_throttling(pr,
- state - max_pstate);
+ state - max_pstate, false);
}
return result;
}
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index 227543789ba91db984862f52040fc18d1a7758e9..841be4ee210920b684dc7e6dd8823bab68c6293f 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -62,7 +62,8 @@ struct throttling_tstate {
#define THROTTLING_POSTCHANGE (2)
static int acpi_processor_get_throttling(struct acpi_processor *pr);
-int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
+int acpi_processor_set_throttling(struct acpi_processor *pr,
+ int state, bool force);
static int acpi_processor_update_tsd_coord(void)
{
@@ -361,7 +362,7 @@ int acpi_processor_tstate_has_changed(struct acpi_processor *pr)
*/
target_state = throttling_limit;
}
- return acpi_processor_set_throttling(pr, target_state);
+ return acpi_processor_set_throttling(pr, target_state, false);
}
/*
@@ -842,7 +843,7 @@ static int acpi_processor_get_throttling_ptc(struct acpi_processor *pr)
ACPI_WARNING((AE_INFO,
"Invalid throttling state, reset"));
state = 0;
- ret = acpi_processor_set_throttling(pr, state);
+ ret = acpi_processor_set_throttling(pr, state, true);
if (ret)
return ret;
}
@@ -915,7 +916,7 @@ static int acpi_processor_get_fadt_info(struct acpi_processor *pr)
}
static int acpi_processor_set_throttling_fadt(struct acpi_processor *pr,
- int state)
+ int state, bool force)
{
u32 value = 0;
u32 duty_mask = 0;
@@ -930,7 +931,7 @@ static int acpi_processor_set_throttling_fadt(struct acpi_processor *pr,
if (!pr->flags.throttling)
return -ENODEV;
- if (state == pr->throttling.state)
+ if (!force && (state == pr->throttling.state))
return 0;
if (state < pr->throttling_platform_limit)
@@ -988,7 +989,7 @@ static int acpi_processor_set_throttling_fadt(struct acpi_processor *pr,
}
static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
- int state)
+ int state, bool force)
{
int ret;
acpi_integer value;
@@ -1002,7 +1003,7 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
if (!pr->flags.throttling)
return -ENODEV;
- if (state == pr->throttling.state)
+ if (!force && (state == pr->throttling.state))
return 0;
if (state < pr->throttling_platform_limit)
@@ -1018,7 +1019,8 @@ static int acpi_processor_set_throttling_ptc(struct acpi_processor *pr,
return 0;
}
-int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
+int acpi_processor_set_throttling(struct acpi_processor *pr,
+ int state, bool force)
{
cpumask_var_t saved_mask;
int ret = 0;
@@ -1070,7 +1072,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
/* FIXME: use work_on_cpu() */
set_cpus_allowed_ptr(current, cpumask_of(pr->id));
ret = p_throttling->acpi_processor_set_throttling(pr,
- t_state.target_state);
+ t_state.target_state, force);
} else {
/*
* When the T-state coordination is SW_ALL or HW_ALL,
@@ -1103,7 +1105,7 @@ int acpi_processor_set_throttling(struct acpi_processor *pr, int state)
set_cpus_allowed_ptr(current, cpumask_of(i));
ret = match_pr->throttling.
acpi_processor_set_throttling(
- match_pr, t_state.target_state);
+ match_pr, t_state.target_state, force);
}
}
/*
@@ -1201,7 +1203,7 @@ int acpi_processor_get_throttling_info(struct acpi_processor *pr)
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Disabling throttling (was T%d)\n",
pr->throttling.state));
- result = acpi_processor_set_throttling(pr, 0);
+ result = acpi_processor_set_throttling(pr, 0, false);
if (result)
goto end;
}
@@ -1307,7 +1309,7 @@ static ssize_t acpi_processor_write_throttling(struct file *file,
if (strcmp(tmpbuf, charp) != 0)
return -EINVAL;
- result = acpi_processor_set_throttling(pr, state_val);
+ result = acpi_processor_set_throttling(pr, state_val, false);
if (result)
return result;
diff --git a/include/acpi/processor.h b/include/acpi/processor.h
index baf1e0a9a7ee9f4ccc309cb72e1554e7bdf46ff8..740ac3ad8fd06fc61b8e2dacc10054ec27469439 100644
--- a/include/acpi/processor.h
+++ b/include/acpi/processor.h
@@ -174,7 +174,7 @@ struct acpi_processor_throttling {
cpumask_var_t shared_cpu_map;
int (*acpi_processor_get_throttling) (struct acpi_processor * pr);
int (*acpi_processor_set_throttling) (struct acpi_processor * pr,
- int state);
+ int state, bool force);
u32 address;
u8 duty_offset;
@@ -321,7 +321,8 @@ static inline int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
/* in processor_throttling.c */
int acpi_processor_tstate_has_changed(struct acpi_processor *pr);
int acpi_processor_get_throttling_info(struct acpi_processor *pr);
-extern int acpi_processor_set_throttling(struct acpi_processor *pr, int state);
+extern int acpi_processor_set_throttling(struct acpi_processor *pr,
+ int state, bool force);
extern const struct file_operations acpi_processor_throttling_fops;
extern void acpi_processor_throttling_init(void);
/* in processor_idle.c */