There are issues with trusting a pci attached wifi device running a pile of closed firmware anyways.
If you're concerned about this type of thing discard the internal wifi card and use an usb-attached wifi dongle you can unplug to achieve a "wifi physically disconnected" state with certainty.
The other advantage is whatever firmware's running on the wifi dongle isn't going to be potentially accessing host memory over usb, which a pci bus master could theoretically do.
If you're concerned about this type of thing discard the internal wifi card and use an usb-attached wifi dongle you can unplug to achieve a "wifi physically disconnected" state with certainty.
The other advantage is whatever firmware's running on the wifi dongle isn't going to be potentially accessing host memory over usb, which a pci bus master could theoretically do.