I'm very curious on how this all works, so would somebody please give me a
pointer where to start reading concerning linux and PCI
reordering/pci_write_config_dword?
The PCI controller might be illegally reordering PCI MEM space
accesses to the card's registers with asynchronous DMA activity.
If that is true, the explanation is that the PCI config space
accesses synchrnoize wrt. pending DMA operations the device is
doing.
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