Date: Sat, 10 Sep 2005 21:08:59 -0600 (MDT) From: "M. Warner Losh" <imp@bsdimp.com> To: joao.barros@gmail.com Cc: freebsd-current@freebsd.org, mike@sentex.net Subject: Re: 6.0-CURRENT SNAP004 hangs on amr (patch) Message-ID: <20050910.210859.133432771.imp@bsdimp.com> In-Reply-To: <70e8236f05091016251510408c@mail.gmail.com> References: <70e8236f05090513381584dda0@mail.gmail.com> <70e8236f0509051350e020f76@mail.gmail.com> <70e8236f05091016251510408c@mail.gmail.com>
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In message: <70e8236f05091016251510408c@mail.gmail.com>
Joao Barros <joao.barros@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
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