I get that error as well. It's very frustrating. I don't have Little Snitch (although it looks like a cool program) so it's unrelated to that.
It happens when resuming from sleep.
If I reboot, then the problem goes away, but it's annoying to have to save all my work locally (no Internet connection) then reboot. It happens some of the time, but not all of the time. It's not related to any particular Wi-Fi network or hotspot that I'm near, so I can rule out channels, interference, and so on.
About 10 times a second, this message appears, over and over, in Console:
WLAN adapter PCIE config space was not restored (stateNumber = 2)
WLAN adapter PCIE config space was not restored (stateNumber = 2)
WLAN adapter PCIE config space was not restored (stateNumber = 2)
WLAN adapter PCIE config space was not restored (stateNumber = 2)
WLAN adapter PCIE config space was not restored (stateNumber = 2)
WLAN adapter PCIE config space was not restored (stateNumber = 2)
WLAN adapter PCIE config space was not restored (stateNumber = 2)
WLAN adapter PCIE config space was not restored (stateNumber = 2)
WLAN adapter PCIE config space was not restored (stateNumber = 2)
WLAN adapter PCIE config space was not restored (stateNumber = 2)
This keeps going forever, until I reboot. It's like something inside the kernel is stuck in an infinite loop. Because of all this excess logging going on, the Mac becomes slow.
I tried the steps listed in "swithed2mac"'s post just above, and they unfortunately didn't help. I didn't have many of those plist files anyway.
Another thread: https://discussions.apple.com/thread/5237208
Does anybody else have this problem?
Really hoping to find others, maybe there is a solution.
Josh