Date: Sat, 10 Sep 2005 23:09:56 -0600 From: Scott Long <scottl@samsco.org> To: "M. Warner Losh" <imp@bsdimp.com> Cc: joao.barros@gmail.com, freebsd-current@freebsd.org, mike@sentex.net Subject: Re: 6.0-CURRENT SNAP004 hangs on amr (patch) Message-ID: <4323BC24.9020902@samsco.org> In-Reply-To: <20050910.210859.133432771.imp@bsdimp.com> References: <70e8236f05090513381584dda0@mail.gmail.com> <70e8236f0509051350e020f76@mail.gmail.com> <70e8236f05091016251510408c@mail.gmail.com> <20050910.210859.133432771.imp@bsdimp.com>
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M. Warner Losh wrote: > 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 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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