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| author |   Rafael J. Wysocki <rjw@sisk.pl> | 2011-08-08 23:43:29 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-08-25 15:33:44 +0200 |
| commit | 3f241775c30365c33a0d2f6d40f4cf12470f48c6 (patch) | |
| tree | 45b3fa3b5da4d9cbb006762118dcd0f8837434ff /include/linux/pm_domain.h | |
| parent | PM / Domains: Make pm_genpd_poweron() always survive parent removal (diff) | |
| download | linux-dev-3f241775c30365c33a0d2f6d40f4cf12470f48c6.tar.xz linux-dev-3f241775c30365c33a0d2f6d40f4cf12470f48c6.zip | |
PM / Domains: Add "wait for parent" status for generic PM domains
The next patch will make it possible for a generic PM domain to have
multiple parents (i.e. multiple PM domains it depends on). To
prepare for that change it is necessary to change pm_genpd_poweron()
so that it doesn't jump to the start label after running itself
recursively for the parent domain. For this purpose, introduce a new
PM domain status value GPD_STATE_WAIT_PARENT that will be set by
pm_genpd_poweron() before calling itself recursively for the parent
domain and modify the code in drivers/base/power/domain.c so that
the GPD_STATE_WAIT_PARENT status is guaranteed to be preserved during
the execution of pm_genpd_poweron() for the parent.
This change also causes pm_genpd_add_subdomain() and
pm_genpd_remove_subdomain() to wait for started pm_genpd_poweron() to
complete and allows pm_genpd_runtime_resume() to avoid dropping the
lock after powering on the PM domain.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'include/linux/pm_domain.h')
| -rw-r--r-- | include/linux/pm_domain.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 81c5782d90a3..97e3f8eb4978 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -13,6 +13,7 @@ enum gpd_status { GPD_STATE_ACTIVE = 0, /* PM domain is active */ + GPD_STATE_WAIT_PARENT, /* PM domain's parent is being waited for */ GPD_STATE_BUSY, /* Something is happening to the PM domain */ GPD_STATE_REPEAT, /* Power off in progress, to be repeated */ GPD_STATE_POWER_OFF, /* PM domain is off */ |