From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH v5 1/6] ata: make ata port as parent device of scsi host Date: Wed, 07 Dec 2011 15:04:38 -0500 Message-ID: <4EDFC6D6.3050601@pobox.com> References: <1323048028-10421-1-git-send-email-ming.m.lin@intel.com> <1323048028-10421-2-git-send-email-ming.m.lin@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1323048028-10421-2-git-send-email-ming.m.lin@intel.com> Sender: linux-kernel-owner@vger.kernel.org To: Lin Ming Cc: James Bottomley , Alan Stern , Tejun Heo , linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-pm@vger.kernel.org, "Rafael J. Wysocki" , Huang Ying , Zhang Rui List-Id: linux-ide@vger.kernel.org On 12/04/2011 08:20 PM, Lin Ming wrote: > Currently, the device tree of ata port and scsi host looks as below, > > /sys/devices/pci0000:00/0000:00:1f.2 (ahci controller) > |-- ata1 (ata port) > |-- host0 (scsi host) > |-- target0:0:0 (scsi target) > |-- 0:0:0:0 (disk) > > This patch makes ata port as parent device of scsi host, then it becomes > > /sys/devices/pci0000:00/0000:00:1f.2 (ahci controller) > |-- ata1 (ata port) > |-- host0 (scsi host) > |-- target0:0:0 (scsi target) > |-- 0:0:0:0 (disk) > > With this change, the ata port runtime PM is easier. > For example, the ata port runtime suspend will happen as, > > disk suspend --> scsi target suspend --> scsi host suspend --> ata port > suspend. > > Acked-by: Tejun Heo > Signed-off-by: Lin Ming > --- > drivers/ata/libata-scsi.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) applied 1-6, thanks