From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Fajun Chen <fajunchen@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>,
Mark Lord <liml@rtr.ca>, Tejun Heo <htejun@gmail.com>
Subject: Re: PATA Sil680 Disabling IRQ
Date: Thu, 28 Feb 2008 20:22:55 +0000 [thread overview]
Message-ID: <20080228202255.5e3f0c43@core> (raw)
In-Reply-To: <8202f4270802271620u6cea6176p2bea5ff8e0b9bbef@mail.gmail.com>
> PIO read/writes with wrong direction is not the only failure mode,
> PATA sil680 also failed with disabling IRQ with some unsupported
> commands such as Trusted Send (0x5E) even with perfect TF data. Given
> that some ATA commands are optional, we may have a chance to hit the
> trap even with well programmed code.
That sounds very strange - I regularly test PATA controlles with
unsupported commands and see the correct 0x04 abort patterns.
> What would take to harden the PATA ISR code such that it fails more gracefully?
First thing would be to work out why your system is behaving differently
to the others. What is the trigger here.
Alan
next prev parent reply other threads:[~2008-02-28 20:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-27 0:47 PATA Sil680 Disabling IRQ Fajun Chen
2008-02-27 0:58 ` Jeff Garzik
2008-02-28 0:20 ` Fajun Chen
2008-02-28 20:22 ` Alan Cox [this message]
2008-02-28 22:11 ` Fajun Chen
2008-02-28 22:24 ` Jeff Garzik
2008-02-28 23:10 ` Alan Cox
2008-02-29 1:07 ` Fajun Chen
2008-02-29 11:21 ` Alan Cox
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