leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

PM / Domains: Check device PM QoS flags in pm_genpd_poweroff()

Browse Source 
Make the generic PM domains pm_genpd_poweroff() function take
device PM QoS flags into account when deciding whether or not to
remove power from the domain.

After this change the routine will return -EBUSY without executing
the domain's .power_off() callback if there is at least one PM QoS
flags request for at least one device in the domain and at least of
those request has at least one of the NO_POWER_OFF and REMOTE_WAKEUP
flags set.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Jean Pihet <j-pihet@ti.com>
Reviewed-by: mark gross <markgross@thegnar.org>
This commit is contained in:
Rafael J. Wysocki 2012-10-24 02:08:30 +02:00
parent e39473d0b9
commit 34b1f76275
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/base/power/domain.c
View File

@ -470,10 +470,19 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
return -EBUSY;
not_suspended = 0;
list_for_each_entry(pdd, &genpd->dev_list, list_node)
list_for_each_entry(pdd, &genpd->dev_list, list_node) {
enum pm_qos_flags_status stat;
stat = dev_pm_qos_flags(pdd->dev,
PM_QOS_FLAG_NO_POWER_OFF
| PM_QOS_FLAG_REMOTE_WAKEUP);
if (stat > PM_QOS_FLAGS_NONE)
return -EBUSY;
if (pdd->dev->driver && (!pm_runtime_suspended(pdd->dev)
|| pdd->dev->power.irq_safe))
not_suspended++;
}
if (not_suspended > genpd->in_progress)
return -EBUSY;