From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pat LaVarre Subject: Re: [usb-storage] Re: [PATCH] fix Sony USB mass storage - pass larger receive buffer Date: 13 Nov 2003 12:30:32 -0700 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <1068751832.16444.78.camel@patrh9> References: <1068744259.13580.41.camel@patrh9> <20031113100424.A26197@beaverton.ibm.com> <1068747355.16444.22.camel@patrh9> <1068747746.16444.30.camel@patrh9> <1068747998.16444.35.camel@patrh9> <1068748629.16444.58.camel@patrh9> <20031113111344.B30194@one-eyed-alien.net> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from email-out1.iomega.com ([147.178.1.82]:12738 "EHLO email.iomega.com") by vger.kernel.org with ESMTP id S264405AbTKMTbJ (ORCPT ); Thu, 13 Nov 2003 14:31:09 -0500 In-Reply-To: <20031113111344.B30194@one-eyed-alien.net> List-Id: linux-scsi@vger.kernel.org To: mdharm-scsi@one-eyed-alien.net Cc: patmans@us.ibm.com, stern@rowland.harvard.edu, james.bottomley@steeleye.com, linux-scsi@vger.kernel.org, usb-storage@one-eyed-alien.net, ronald@kuetemeier.com, dmitrik@users.sourceforge.net, idan@idanso.dyndns.org > Our experience tells us that xFF is often used because designers are one of > the following: > (a) lazy > (b) incompetient Choosing to violate spec, certainly. > (c) driven by marketing, which wants to load an .inf so their > device seems 'special' (custom icons, etc.) > > So xFF doesn't really tell us, deterministically, anything at all. Do we here agree violently? bInterfaceSubClass = xFF tells us Windows does not speak to the device with Microsoft's generic driver by default. That .inf we do not have in Linux may then say to use the generic driver, or may say to use some other driver. > Knowing that the device is direct-access, however, implies very strongly > that MODE_SENSE[_10] is a bad idea. Anybody able to clue me in quickly as to why classifying a device as writable or not, rather than a disc, can ever be meaningful? Maybe guessing not writable helps only (in the vanishingly small corner case) when a disc is write-protectable although Not removable without also removing the drive? Pat LaVarre