From mboxrd@z Thu Jan 1 00:00:00 1970 From: Johannes Thumshirn Subject: Re: [PATCH 1/7] scsi: hisi_sas: workaround v2 hw SATA IO timeout issue Date: Thu, 19 Jan 2017 09:41:49 +0100 Message-ID: <20170119084149.GE5054@linux-x5ow.site> References: <1484757173-235951-1-git-send-email-john.garry@huawei.com> <1484757173-235951-2-git-send-email-john.garry@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Return-path: Content-Disposition: inline In-Reply-To: <1484757173-235951-2-git-send-email-john.garry@huawei.com> Sender: linux-kernel-owner@vger.kernel.org To: John Garry Cc: jejb@linux.vnet.ibm.com, martin.petersen@oracle.com, linuxarm@huawei.com, zhangfei.gao@linaro.org, xuwei5@hisilicon.com, john.garry2@mail.dcu.ie, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, Xiang Chen List-Id: linux-scsi@vger.kernel.org On Thu, Jan 19, 2017 at 12:32:47AM +0800, John Garry wrote: > From: Xiang Chen > > The v2 SAS controller needs more time to detect channel idle > and send setup link request than SATA disk does, so it is > difficult for SAS controller to setup an STP link. Therefore it > may cause some IO timeouts. > > We need to periodically configure the SAS controller so it > doesn't receive STP setup requests from SATA disks for a while, > so IO can be sent during this period. > > Signed-off-by: Xiang Chen > Signed-off-by: John Garry > --- Looks good, Reviewed-by: Johannes Thumshirn -- Johannes Thumshirn Storage jthumshirn@suse.de +49 911 74053 689 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: Felix Imendörffer, Jane Smithard, Graham Norton HRB 21284 (AG Nürnberg) Key fingerprint = EC38 9CAB C2C4 F25D 8600 D0D0 0393 969D 2D76 0850