On Thu, 4 Oct 2007, Ralf Baechle wrote: > It's documented somewhere in their specs. Whatever, it ends crashing > the system so device 31 is hands off. OK, found it -- it is the GT-64120A erratum FEr#19 leading to a hang of the device; perhaps we should mention it briefly in the source code. While the PCI spec says reads from the device #31, function #7 for host bridges implementing the recommended special cycle generation mechanism have undefined results, this behaviour is certainly "undefined" in a very silly way and then, according to the spec, it must not happen for the function #0, which is the only one probed by Linux by default for single-function devices. Maciej
