Date: Wed, 30 Jul 2003 15:34:54 -0400 (EDT) From: John Baldwin <jhb@FreeBSD.org> To: Nate Lawson <nate@root.org> Cc: scsi@freebsd.org Subject: RE: PATCH: Disable 6 byte commands for USB, firewire, ATAPICAM Message-ID: <XFMail.20030730153454.jhb@FreeBSD.org> In-Reply-To: <20030724183246.X42809@root.org>
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On 25-Jul-2003 Nate Lawson wrote: > Attached is a patch that disables ever sending 6 byte commands to buses > that do not support them. Numerous USB devices hang when receiving a 6 > byte command. For testing, this patch comments out the scsi_da quirks for > devices that I believe are addressed by this patch and no longer need the > quirk. > > Please test devices such as USB keys, USB cameras, Firewire hard disks, > and ATAPICAM cd drives to be sure they still work with this patch. > Especially if you've needed a quirk before, it is important to see if this > patch does not break your device. I hope to get this into the tree early > so there is plenty of testing before 5.2. You should remove the 6 to 10 translation that is already in umass(4) for UFI and ATAPI devices. I didn't do it for SCSI devices because the SCSI transport was supposed to work ok with 6 byte commands. Not all devices properly report their transport though. -- John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/
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