From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH] phylib: fix device deletion order in mdiobus_unregister() Date: Tue, 01 Sep 2015 15:03:04 -0700 (PDT) Message-ID: <20150901.150304.562643685874217745.davem@davemloft.net> References: <1441114565-2340-1-git-send-email-msalter@redhat.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: ddaney.cavm@gmail.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, f.fainelli@gmail.com, buytenh@wantstofly.org, grant.likely@secretlab.ca To: msalter@redhat.com Return-path: In-Reply-To: <1441114565-2340-1-git-send-email-msalter@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Mark Salter Date: Tue, 1 Sep 2015 09:36:05 -0400 > commit 8b63ec1837fa ("phylib: Make PHYs children of their MDIO bus, not > the bus' parent.") uncovered a problem in mdiobus_unregister() which > leads to this warning when I reboot an APM Mustang (arm64) platform: ... > The problem is that mdiobus_unregister() deletes the bus device before > unregistering the phy devices on the bus. This wasn't a problem before > because the phys were not children of the bus: > > /sys/devices/platform/APMC0D05:00/net/eth0/xgene-mii-eth0:03 > /sys/devices/platform/APMC0D05:00/net/eth0/xgene-mii-eth0 > > But now that they are: > > /sys/devices/platform/APMC0D05:00/net/eth0/xgene-mii-eth0/xgene-mii-eth0:03 > > when mdiobus_unregister deletes the bus device, the phy subdirs are > removed from sysfs also. So when the phys are unregistered afterward, > we get the warning. This patch changes the order so that phys are > unregistered before the bus device is deleted. > > Signed-off-by: Mark Salter Applied and queued up for -stable, thanks.