From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e39.co.us.ibm.com (e39.co.us.ibm.com [32.97.110.160]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 384271A01C5 for ; Wed, 30 Jul 2014 06:38:27 +1000 (EST) Received: from /spool/local by e39.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 29 Jul 2014 14:38:24 -0600 Received: from b01cxnp22034.gho.pok.ibm.com (b01cxnp22034.gho.pok.ibm.com [9.57.198.24]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id C167238C8039 for ; Tue, 29 Jul 2014 16:38:22 -0400 (EDT) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by b01cxnp22034.gho.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s6TKcMtb65863810 for ; Tue, 29 Jul 2014 20:38:22 GMT Received: from d01av04.pok.ibm.com (localhost [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s6TKWViG004709 for ; Tue, 29 Jul 2014 16:38:22 -0400 From: Tyrel Datwyler To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH] powerpc/pci: reorder pci bus/bridge unregistration during PHB removal Date: Tue, 29 Jul 2014 13:48:13 -0400 Message-Id: <1406656093-23908-1-git-send-email-tyreld@linux.vnet.ibm.com> Cc: stable@vger.kernel.org, paulus@samba.org, Tyrel Datwyler , nfont@linux.vnet.ibm.com List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Commit bcdde7e made __sysfs_remove_dir() recursive and introduced a BUG_ON during PHB removal while attempting to delete the power managment attribute group of the bus. This is a result of tearing the bridge and bus devices down out of order in remove_phb_dynamic. Since, the the bus resides below the bridge in the sysfs device tree it should be torn down first. This patch simply moves the device_unregister call for the PHB bridge device after the device_unregister call for the PHB bus. Fixes: bcdde7e221a8 ("sysfs: make __sysfs_remove_dir() recursive") Cc: stable@vger.kernel.org Signed-off-by: Tyrel Datwyler --- v2: - Included stable kernel list on Cc per comment by mpe arch/powerpc/platforms/pseries/pci_dlpar.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/pseries/pci_dlpar.c b/arch/powerpc/platforms/pseries/pci_dlpar.c index 203cbf0..89e2381 100644 --- a/arch/powerpc/platforms/pseries/pci_dlpar.c +++ b/arch/powerpc/platforms/pseries/pci_dlpar.c @@ -118,10 +118,10 @@ int remove_phb_dynamic(struct pci_controller *phb) } } - /* Unregister the bridge device from sysfs and remove the PCI bus */ - device_unregister(b->bridge); + /* Remove the PCI bus and unregister the bridge device from sysfs */ phb->bus = NULL; pci_remove_bus(b); + device_unregister(b->bridge); /* Now release the IO resource */ if (res->flags & IORESOURCE_IO) -- 1.7.12.4