Commit b472c2fa authored Jan 27, 2015 by Ulf Hansson Committed by Rafael J. Wysocki Feb 03, 2015

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



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>

parent f104e1e5

drivers/base/power/domain.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -1467,8 +1467,9 @@ int __pm_genpd_add_device(struct generic_pm_domain genpd, struct device dev,
		goto out;
		}

		if (genpd->attach_dev)
		genpd->attach_dev(genpd, dev);
		ret = genpd->attach_dev ? genpd->attach_dev(genpd, dev) : 0;
		if (ret)
		goto out;

		genpd->device_count++;
		genpd->max_off_time_changed = true;