6.0-CURRENT SNAP004 hangs on amr (patch)

Scott Long scottl at samsco.org
Sat Sep 10 22:10:02 PDT 2005


M. Warner Losh wrote:
> In message: <70e8236f05091016251510408c at mail.gmail.com>
>             Joao Barros <joao.barros at gmail.com> writes:
> : I believe a workaround for this issue would be verifying before
> : disabling the device, that no more that one device shares that
> : particular pci slot.
> : 
> : Comments?
> 
> No.  That's not a fair workaround.  There's too many other cases that
> this would break.  Amrs are farily rare, and having a workaround that
> negatively affects other hardware is undesirable.
> 
> The problem is that the AMR device attaches to only one of the PCI
> devices, when it should attach a dummy driver to the second one.  This
> is due to flaws in the amr hardware design, which we've also seen in
> the aac cards.
> 
> Warner

I don't really care if you think that it's a flaw.  What it comes down 
to is that it's a problem with FreeBSD.

Scott


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