Comment 37 for bug 369005

Workaround:

Just want to mention that they have published a workaround, which is done in 5 minutes:

http://wireless.kernel.org/en/users/Drivers/ath5k#Eliminating_.60ath5k:_unsupported_jumbo.60_bug

It works well for me with AR5001 and 10.4.

The precise ASPM setting is the point:

   ASPM_SETTING=2

You are in danger to miss it, in all the description of the workaround.