From: Bharata B Rao <bharata@linux.vnet.ibm.com>
Date: Mon, 7 Sep 2015 10:22:40 +0000 (+0530)
Subject: powerpc/pseries: Release DRC when configure_connector fails
X-Git-Tag: omap-for-v4.3/fixes-rc5~117^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=daebaabb5cfbe4a6f09ca0e0f8b7673efc704960;p=pandora-kernel.git

powerpc/pseries: Release DRC when configure_connector fails

Commit f32393c943e2 ("powerpc/pseries: Correct cpu affinity for
dlpar added cpus") moved dlpar_acquire_drc() call to before
dlpar_configure_connector() call in dlpar_cpu_probe(), but missed
to release the DRC if dlpar_configure_connector() failed.
During CPU hotplug, if configure-connector fails for any reason,
then this will result in subsequent CPU hotplug attempts to fail.

Release the acquired DRC if dlpar_configure_connector() call fails
so that the DRC is left in right isolation and allocation state
for the subsequent hotplug operation to succeed.

Fixes: f32393c943e2 ("powerpc/pseries: Correct cpu affinity for dlpar added cpus")
Cc: stable@vger.kernel.org # 4.1+
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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