MCP55 SATA solution to test

Marco Bröder marco.broeder at
Sun Oct 25 16:37:17 UTC 2009

On Sun October 25 2009 02:46:57 Alexander Motin wrote:
> Hi.
> Thanks to one man who provided access to his machine, I seem to found
> how to fix device detection on nVidia MCP55 SATA controller on amd64
> 8.0. Looks like this controller need some time (very short) to enable
> BAR(5) memory access after PCI configuration register written. Probably
> some changes in PCI code exposed this issue. Also it explains why
> setting hw.pci.mcfg to 0 helps.
> Attached patch solves problem for that machine. Testers are welcome.

Success! I tested your patch and everything is working fine
with hw.pci.mcfg set to 1, now. Please commit it.

Many thanks!

Marco Bröder <marco.broeder at>
OpenPGP key fingerprint: 5615 106E 031A F3D3 64CC 0F9E 4DCE 6524 F595 082F

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