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authorRafael J. Wysocki <rjw@sisk.pl>2011-07-14 22:59:20 +0400
committerRafael J. Wysocki <rjw@sisk.pl>2011-07-14 22:59:20 +0400
commitd28054020f97c7c9f15327a53945f0f40ffc5d7a (patch)
tree0c1d4dcef6eca9c5fe6a435d8a86d51c373d90c8 /drivers/base
parent0bc5b2debb832191a42baea7ff59d2ca6ce9f7d5 (diff)
downloadlinux-d28054020f97c7c9f15327a53945f0f40ffc5d7a.tar.xz
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>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/domain.c12
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 00ed4f32a4de..be8714aa9dd6 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -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;