diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-02-11 00:35:29 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-02-11 00:35:29 +0100 |
| commit | 327adaedf2218b0e318eb393aa79cf2be64c199f (patch) | |
| tree | 957c1e005c256e6c201054328f9ea000428b00c5 | |
| parent | b02f6695f7601c4f8442b9cf4636802e7fa8d550 (diff) | |
| download | linux-327adaedf2218b0e318eb393aa79cf2be64c199f.tar.bz2 | |
PM / QoS: Add no_constraints_value field to struct pm_qos_constraints
Add a new field, no_constraints_value, to struct pm_qos_constraints
representing a list of PM QoS constraint requests to be returned by
pm_qos_get_value() when that list of requests is empty.
That field will be equal to default_value for all of the existing
global PM QoS classes and for the resume latency device PM QoS type,
but it will be different from default_value for the new latency
tolerance device PM QoS type introduced by the next changeset.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/base/power/qos.c | 1 | ||||
| -rw-r--r-- | include/linux/pm_qos.h | 1 | ||||
| -rw-r--r-- | kernel/power/qos.c | 5 |
3 files changed, 6 insertions, 1 deletions
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c index 67c0f4219b02..c754e55f9dcb 100644 --- a/drivers/base/power/qos.c +++ b/drivers/base/power/qos.c @@ -190,6 +190,7 @@ static int dev_pm_qos_constraints_allocate(struct device *dev) plist_head_init(&c->list); c->target_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE; c->default_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE; + c->no_constraint_value = PM_QOS_RESUME_LATENCY_DEFAULT_VALUE; c->type = PM_QOS_MIN; c->notifiers = n; diff --git a/include/linux/pm_qos.h b/include/linux/pm_qos.h index 88a3680ae74c..2d8ce50877d8 100644 --- a/include/linux/pm_qos.h +++ b/include/linux/pm_qos.h @@ -77,6 +77,7 @@ struct pm_qos_constraints { struct plist_head list; s32 target_value; /* Do not change to 64 bit */ s32 default_value; + s32 no_constraint_value; enum pm_qos_type type; struct blocking_notifier_head *notifiers; }; diff --git a/kernel/power/qos.c b/kernel/power/qos.c index 8dff9b48075a..e23ae38e647f 100644 --- a/kernel/power/qos.c +++ b/kernel/power/qos.c @@ -66,6 +66,7 @@ static struct pm_qos_constraints cpu_dma_constraints = { .list = PLIST_HEAD_INIT(cpu_dma_constraints.list), .target_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE, .default_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE, + .no_constraint_value = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE, .type = PM_QOS_MIN, .notifiers = &cpu_dma_lat_notifier, }; @@ -79,6 +80,7 @@ static struct pm_qos_constraints network_lat_constraints = { .list = PLIST_HEAD_INIT(network_lat_constraints.list), .target_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE, .default_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE, + .no_constraint_value = PM_QOS_NETWORK_LAT_DEFAULT_VALUE, .type = PM_QOS_MIN, .notifiers = &network_lat_notifier, }; @@ -93,6 +95,7 @@ static struct pm_qos_constraints network_tput_constraints = { .list = PLIST_HEAD_INIT(network_tput_constraints.list), .target_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE, .default_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE, + .no_constraint_value = PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE, .type = PM_QOS_MAX, .notifiers = &network_throughput_notifier, }; @@ -128,7 +131,7 @@ static const struct file_operations pm_qos_power_fops = { static inline int pm_qos_get_value(struct pm_qos_constraints *c) { if (plist_head_empty(&c->list)) - return c->default_value; + return c->no_constraint_value; switch (c->type) { case PM_QOS_MIN: |