From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [PATCH V3 01/16] scsi: support well known logical units Date: Wed, 10 Sep 2014 11:58:39 -0700 Message-ID: <20140910185839.GA26364@infradead.org> References: <1410350063-23267-1-git-send-email-draviv@codeaurora.org> <1410350063-23267-2-git-send-email-draviv@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1410350063-23267-2-git-send-email-draviv@codeaurora.org> Sender: linux-scsi-owner@vger.kernel.org To: Dolev Raviv Cc: James.Bottomley@HansenPartnership.com, hch@infradead.org, linux-scsi@vger.kernel.org, linux-scsi-owner@vger.kernel.org, linux-arm-msm@vger.kernel.org, santoshsy@gmail.com, Subhash Jadavani , Sujit Reddy Thumma , "Martin K. Petersen" List-Id: linux-arm-msm@vger.kernel.org On Wed, Sep 10, 2014 at 02:54:08PM +0300, Dolev Raviv wrote: > From: Subhash Jadavani > > REPORT LUNS command has "SELECT REPORT" field which controls what type of > logical units to be reported by device server. According to UFS device > standard, if this field is set to 0, REPORT LUNS would report only report > standard logical units. If it's set to 1 then it would report only well > known logical unit and if it's set to 2 then device would report both > standard and well known logical units. This is the defintion of the field in SPC (does the UFS spec duplicate all of SPC?), but still doesn't explain why you want it. Also the SELECT REPORT field only appeared in SPC-3, so we should not set it for devices that report older standards compliance.