Date: Wed, 3 Feb 2010 22:38:05 +0100 (CET) From: Michael Reifenberger <mike@reifenberger.com> To: Alexander Motin <mav@FreeBSD.org> Cc: FreeBSD-Current <freebsd-current@freebsd.org> Subject: Re: Odd ada(4) failures when trying using USB scanner Message-ID: <alpine.BSF.2.00.1002032230040.3542@gw.reifenberger.com> In-Reply-To: <4B69B707.2020504@FreeBSD.org> References: <1264818191.00213314.1264807803@10.7.7.3> <1264861382.00213426.1264851002@10.7.7.3> <1264864983.00213434.1264852204@10.7.7.3> <1265026986.00214174.1265016606@10.7.7.3> <1265030583.00214182.1265019602@10.7.7.3> <1265037797.00214273.1265026205@10.7.7.3> <1265037810.00214278.1265026802@10.7.7.3> <1265048584.00214331.1265035802@10.7.7.3> <4B69B707.2020504@FreeBSD.org>
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On Wed, 3 Feb 2010, Alexander Motin wrote: ... >>> I would say that scanner application tries to probe all CAM devices, >>> looking for scanner. While doing it, it uses SCSI/ATAPI commands with >>> odd-sized transfer sizes. It causes errors from ata(4) and triggers bug >>> in IXP700 AHCI controller. Odd-sized requests are generally not >>> supported by ATA/SATA. Second problem is in work now. >> >> Could odd-sized commands be prohibited/ignored by the driver then? > > I've recently committed patch to 9-CURRENT, that should block sending of > SCSI commands to non-ATAPI devices. That should fix your problem. I'm currently running HEAD @ r203376 and it fixed my problem already. Thanks for your work! Bye/2 --- Michael Reifenberger Michael@Reifenberger.com http://www.Reifenberger.com
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