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Date: Fri, 14 Mar 2003 01:13:53 -0800 (PST)
From: Andre Hedrick <andre@linux-ide.org>
To: "rain.wang" <rain.wang@mic.com.tw>
cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: system hang on HDIO_DRIVE_RESET! help!
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Rain,

The only way to deal with this is to treat the operations a failed and
punch them back out to block for clean up.  Now we failed the a command.
However, I think I need to set a default block hook during the reset
process for the drive, channel, hba ... depending on the magnitude of the
wrecking ball generated.  I need to offline Alan for this core dump.

The hang is in the clean ups after the reset.

I suspect the driver/hba is in DMA and drive is not.

Cheers,

Andre Hedrick
LAD Storage Consulting Group
------------------------------------
Pokemon (n), A Jamaican proctologist
------------------------------------

On Fri, 14 Mar 2003, rain.wang wrote:

> Alan Cox wrote:
> 
> > On Fri, 2003-03-07 at 06:04, rain.wang wrote:
> > > > Once I understand what the problems all are yes. The BUG() is good, it
> > > > confirms that what we are both seeing is the same thing - the reset is
> > > > managing to issue two commands to the controller at the same time.
> > >
> > > Hi,
> > >     thank you, Alan. I tested pre5-ac2 patch and that seems all ok.
> >
> > Thanks for the confirmation it is fixed
> 
> Hi Alan,
>     for 2.4.21-pre5-ac2 and -ac3 patch also.
>     there's still problem on reset. when I do 'hdparm -w /dev/hda' once
> after another, all seems ok.  but when I make a shell script and let
> 'hdparm -w' run in several times loop, system would always crashed
> at the second time and left oops messages:
>     kernel BUG at ide.c:1700!
>     ...
> so, if any bugs still locking there?
> 
> rain.w
> 
> 
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