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PM / Domains: Take .power_off() error code into account 

Currently pm_genpd_poweroff() discards error codes returned by
the PM domain's .power_off() callback, because it's safer to always
regard the domain as inaccessible to drivers after a failing
.power_off().  Still, there are situations in which the low-level
code may want to indicate that it doesn't want to power off the
domain, so allow it to do that by returning -EBUSY from .power_off().

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>
This commit is contained in:
Rafael J. Wysocki 2011-07-14 20:59:20 +02:00
parent 0bc5b2debb
commit d28054020f
1 changed files with 10 additions and 2 deletions
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12
drivers/base/power/domain.c
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@ -312,8 +312,16 @@ static int pm_genpd_poweroff(struct generic_pm_domain *genpd)
}
}
if (genpd->power_off)
genpd->power_off(genpd);
if (genpd->power_off) {
ret = genpd->power_off(genpd);
if (ret == -EBUSY) {
genpd_set_active(genpd);
if (parent)
genpd_release_lock(parent);
goto out;
}
}
genpd->status = GPD_STATE_POWER_OFF;