From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:48926 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752414AbbIWFAA (ORCPT ); Wed, 23 Sep 2015 01:00:00 -0400 Subject: Patch "powerpc/pseries: Release DRC when configure_connector fails" has been added to the 4.2-stable tree To: bharata@linux.vnet.ibm.com, gregkh@linuxfoundation.org, mpe@ellerman.id.au, nfont@linux.vnet.ibm.com Cc: , From: Date: Tue, 22 Sep 2015 21:59:40 -0700 Message-ID: <1442984380142155@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled powerpc/pseries: Release DRC when configure_connector fails to the 4.2-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: powerpc-pseries-release-drc-when-configure_connector-fails.patch and it can be found in the queue-4.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From daebaabb5cfbe4a6f09ca0e0f8b7673efc704960 Mon Sep 17 00:00:00 2001 From: Bharata B Rao Date: Mon, 7 Sep 2015 15:52:40 +0530 Subject: powerpc/pseries: Release DRC when configure_connector fails From: Bharata B Rao commit daebaabb5cfbe4a6f09ca0e0f8b7673efc704960 upstream. 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") Signed-off-by: Bharata B Rao Reviewed-by: Nathan Fontenot Signed-off-by: Michael Ellerman Signed-off-by: Greg Kroah-Hartman --- arch/powerpc/platforms/pseries/dlpar.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/arch/powerpc/platforms/pseries/dlpar.c +++ b/arch/powerpc/platforms/pseries/dlpar.c @@ -422,8 +422,10 @@ static ssize_t dlpar_cpu_probe(const cha dn = dlpar_configure_connector(cpu_to_be32(drc_index), parent); of_node_put(parent); - if (!dn) + if (!dn) { + dlpar_release_drc(drc_index); return -EINVAL; + } rc = dlpar_attach_node(dn); if (rc) { Patches currently in stable-queue which might be from bharata@linux.vnet.ibm.com are queue-4.2/powerpc-pseries-release-drc-when-configure_connector-fails.patch