>>>>> "Jordan" == Jordan Crouse <jordan.crouse@xxxxxxx> writes: Jordan> In the standard AMD VSA, writeos to PCI space 0x48 (DTC), 0x49 Jordan> (CAST) and 0x50 (ETC) should work - and the change should be Jordan> immediately reflected in the MSR. I know what the problem is. I just got a BIOS update tonight which was supposed to fix the issue. However, pata_amd.c still failed spectacularly at configuring the device whereas pata_cs5536 worked fine. For kicks I switched my driver over to using PCI config registers instead of MSRs. And it still worked! When I changed my driver I did a quickie conversion from wrmsr() to pci_write_config_dword(). If I use pci_write_config_byte() instead (like pata_amd.c), things fail miserably. A register dump reveals that any value I write becomes a 0. Yay! -- Martin K. Petersen http://mkp.net/ - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html