Date: Sun, 16 Sep 2007 11:48:00 -0600 From: Scott Long <scottl@samsco.org> To: Ulrich Spoerlein <uspoerlein@gmail.com> Cc: freebsd-scsi@FreeBSD.ORG, njl@FreeBSD.ORG, freebsd-current@FreeBSD.ORG Subject: Re: Retirement of CAM_QUIRK_NOSERIAL Message-ID: <46ED6C50.4040104@samsco.org> In-Reply-To: <20070916115427.GA1427@roadrunner.spoerlein.net> References: <46E615C4.1010605@samsco.org> <20070916115427.GA1427@roadrunner.spoerlein.net>
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Ulrich Spoerlein wrote: > On Mon, 10.09.2007 at 22:12:52 -0600, Scott Long wrote: > >>All, >> >>The attached patch should make CAM behave properly with regard to >>probing device serial numbers only when the device advertises that >>it supports it. It will hopefully eliminate the need for the >>CAM_QUIRK_NOSERIAL quirk (one instance is left because of an unrelated >>legacy problem that may or may not be possible to fix). This should >>especially benefit USB-UMASS devices, where the console output should >>be less noisy. It might even make more devices work out-of-the-box. > > > While this patch is working fine with my USB/FW HDD enclosure, it breaks > my MP3 USB stick > > kernel: umass0: <Samsung YP-U2, class 0/0, rev 2.00/10.01, addr 8> on uhub5 > kernel: umass0: BBB reset failed, IOERROR > kernel: umass0: BBB bulk-in clear stall failed, IOERROR > kernel: umass0: BBB bulk-out clear stall failed, IOERROR Is this a regression of something that works without the patch, or is it something that has never worked? What happens if you use the NO_INQUIRY_EVPD quirk instead? > > This stick needs the SHUTTLE_INIT | NO_GETMAXLUN quirk. Perhaps there is some > interdependencies? Likely only to the extent that this is a pretty difficult device to deal with. > > The patch also, does not magically allow me to read retail DVDs through my > Plextor drive when attached via cd(4), but that is not the goal of the patch > anyway. Actually, I was hoping that it would =-) > > It's funny, though. If I quirk this Plextor DVD to NO_INQUIRY, it will attach > via da(4) (sic!) and suddenly all kinds of DVD media start working! > > umass0: <PLEXTOR DVDR PX-755A, class 0/0, rev 2.00/4.35, addr 8> on uhub5 > da0 at umass-sim0 bus 0 target 0 lun 0 > da0: < > Removable Direct Access SCSI-2 device > da0: 40.000MB/s transfers > da0: 3001MB (1536688 2048 byte sectors: 255H 63S/T 95C) > I'm honestly having a really hard time believing that a device could claim to support "SCSI" but not support a basic INQUIRY command. That's the one command that is absolutely essential to any SCSI device. What if you try the NO_INQUIRY_EVPD or FORCE_SHORT_INQUIRY quirks? Scott
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