From: Tejun Heo <tj@kernel.org>
To: "Foster, Doug F" <doug.f.foster@intel.com>
Cc: Robert Hancock <hancockrwd@gmail.com>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>
Subject: Re: ATAPI question
Date: Wed, 11 Mar 2009 18:31:11 +0900 [thread overview]
Message-ID: <49B784DF.1090802@kernel.org> (raw)
In-Reply-To: <3EAC55E3B6CF7348B3E2CAB2774ADA0403F3215B07@azsmsx504.amr.corp.intel.com>
Hello,
Foster, Doug F wrote:
> Did anyone get a chance to look at these traces?
> Any thoughts on what the problem is?
> Any guidance on experiments that I should try?
> Is there anything else that I can provide to help?
Yeap, I just did. I'm looking at ATAPI_7_LiteOn.sas. The offending
one is the one ending with the FIS 22.723 807 202, right?
On the bus level, everything seems fine. The host prepares for
96bytes transfer and device does it and successfully sends D2H Reg FIS
for command completion. The only thing I can think of is the draining
buffer confusing the controller somehow. If you make
libata-scsi.c::atapi_drain_needed() always return zero, does anything
change?
Thanks.
--
tejun
next prev parent reply other threads:[~2009-03-11 9:30 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-27 23:50 ATAPI question Foster, Doug F
2009-02-28 3:08 ` Robert Hancock
2009-03-01 12:51 ` Tejun Heo
2009-03-02 15:58 ` Foster, Doug F
2009-03-02 21:50 ` Foster, Doug F
2009-03-03 0:35 ` Tejun Heo
2009-03-03 15:44 ` Foster, Doug F
2009-03-03 18:19 ` Foster, Doug F
2009-03-04 1:44 ` Tejun Heo
2009-03-04 2:09 ` Robert Hancock
2009-03-04 15:44 ` Foster, Doug F
2009-03-04 16:03 ` Tejun Heo
2009-03-09 21:35 ` Foster, Doug F
2009-03-11 9:31 ` Tejun Heo [this message]
2009-03-12 21:02 ` Foster, Doug F
2009-03-02 23:33 ` Robert Hancock
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