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From: Mark Lord <kernel@teksavvy.com>
To: Tejun Heo <htejun@gmail.com>, Jeff Garzik <jgarzik@pobox.com>,
	IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: [BUG] libahci returns stale result tf much of the time.
Date: Fri, 24 Sep 2010 01:34:48 -0400	[thread overview]
Message-ID: <4C9C3878.9010206@teksavvy.com> (raw)

I've been trying to understand numerous bug reports I've seen for hdparm
over the past couple of months.  I think they probably all boil down to
the new libahci code not returning a correct result_tf in response
to successful ATA_16/ATA_12 passthru commands.

It seems to return a stale result_tf much of the time.
perfectly reproduceable here on my Jmicron JMB360 PCIe SATA interface.

I am totally lost when looking at libahci code though.
Anyone got any ideas where the bug might be there??

Thanks

             reply	other threads:[~2010-09-24  5:34 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-09-24  5:34 Mark Lord [this message]
2010-09-24  5:49 ` [BUG] libahci returns stale result tf much of the time Seed
2010-09-24  6:27   ` Mark Lord
2010-09-24  7:01     ` Seed
2010-09-24 13:11       ` Mark Lord
2010-09-24 13:24         ` Mark Lord
2010-09-24 23:26           ` Robert Hancock
2010-10-04  9:18             ` Tejun Heo
2010-10-04 17:01               ` Mark Lord
2010-10-04 17:06                 ` Mark Lord
2010-10-04 17:31                   ` Mark Lord
2010-10-04 18:50                     ` Mark Lord
2010-10-04 19:27                       ` Jeff Garzik
2010-10-04 19:35                         ` Mark Lord
2010-10-04 19:42                           ` Jeff Garzik
2010-10-04 19:51                             ` Mark Lord
2010-10-05  7:07                               ` Tejun Heo
2010-10-05 14:06                                 ` Mark Lord
2010-10-05 16:06                                   ` Tejun Heo
2010-10-06  1:00                                     ` Robert Hancock
2010-10-14  8:53                                       ` [PATCH #upstream-fixes] libahci: fix result_tf handling after an ATA PIO data-in command Tejun Heo
2010-10-14 21:38                                         ` Mark Lord
2010-10-15  0:24                                           ` Robert Hancock
2010-10-15  8:45                                             ` Tejun Heo
2010-10-15 22:14                                               ` Mark Lord
2010-10-15  0:32                                         ` Robert Hancock
2010-10-15  8:45                                           ` Tejun Heo
2010-10-15  9:00                                         ` [PATCH UPDATED " Tejun Heo

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