cvs commit: src/sys/dev/esp ncr53c9x.c

[Kris Kennaway]

On Mon, Apr 25, 2005 at 10:11:43PM +0000, Scott Long wrote:
> scottl      2005-04-25 22:11:43 UTC
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/dev/esp          ncr53c9x.c 
>   Log:
>   Apply a torniquet to the problem of the drive unexpectedly disconnecting
>   during a data phase.  Before, we would try to recover the autosense, but
>   the DMA engine would still be active with interrupted transfer, and we'd
>   quickly spiral out of control and cause massive data corruption.  For now,
>   just reset the chip and cancel everything.  The better solution is to
>   cancel the DMA operation, but there is no clear way to do that right now.
>   The data corruption problem is severe enough to warrant this fix in the
>   interim.  Thanks to Kris Kenneway to sacrificing countless filesystems to
>   this bug.
>   
>   MFC After: 3 days

Thanks for fixing it!

Kris
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