From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Chuck Ebbert <cebbert@redhat.com>
Cc: linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: pata_it821x driver reports many FLUSH CACHE command failures
Date: Fri, 24 Sep 2010 00:43:43 +0100 [thread overview]
Message-ID: <20100924004343.0abebfad@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <20100923172724.0da07fb1@katamari>
On Thu, 23 Sep 2010 17:27:24 -0400
Chuck Ebbert <cebbert@redhat.com> wrote:
> It looks like pata_it821x has never supported FLUSH_CACHE, but now
That depends on the firmware you have I believe
The ident it provides also doesn't advertise flush cache so something
appears to be issuing a cache flush despite the drive reporting that it
is not supported.
> we're seeing repeated failures. They happen over and over again and
> prevent installation. I stuck a dump_stack() in the failure path and
> got this:
Yes you'll crash some firmware versions if this occurs.
See:
static unsigned int it821x_read_id(struct ata_device *adev,
struct ata_taskfile *tf, u16 *id)
If this has stopped working then you probably want to get Jeff to trace
back into the ATA and SCSI midlayer to see why it is issuing flushes for
a device which is reporting that cache flush is not supported - because
that is seriously broken.
prev parent reply other threads:[~2010-09-23 23:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-23 21:27 Chuck Ebbert
2010-09-23 23:43 ` Alan Cox [this message]
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