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PM / Domains: Handle errors from genpd's ->attach_dev() callback

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The optional genpd's ->attach_dev() callback is invoked from
__pm_genpd_add_device(). Let's add error handling from the response
from this callback and propagate the error code.

When __pm_genpd_add_device() is invoked through the generic OF-based PM
domain look-up path, the device is being probed. Returning an error
will mean the device won't be attached to its PM domain. Errors of
-EPROBE_DEFER get special treatment and is propagated to the driver
core.

Therefore this change also enables the ->attach_dev() callback to
be able to request for a deferred probe sequence.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2015-01-27 21:13:45 +01:00 committed by Rafael J. Wysocki
parent f104e1e5ef
commit b472c2faf4
1 changed files with 3 additions and 2 deletions
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5
drivers/base/power/domain.c
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@ -1467,8 +1467,9 @@ int __pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
goto out; goto out;
} }
if (genpd->attach_dev) ret = genpd->attach_dev ? genpd->attach_dev(genpd, dev) : 0;
genpd->attach_dev(genpd, dev); if (ret)
goto out;
genpd->device_count++; genpd->device_count++;
genpd->max_off_time_changed = true; genpd->max_off_time_changed = true;