From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Tue, 27 Jan 2015 20:13:45 +0000 (+0100)
Subject: PM / Domains: Handle errors from genpd's ->attach_dev() callback
X-Git-Tag: fixes-v4.0-rc1~160^2~3^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b472c2faf471b72e7f3ffe35200dfb3d227487b7;p=pandora-kernel.git

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>
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