quite unusable wifi

[Pietro "m0nt0" Montorfano]

Hi list,
i have an acer laptop running fedora 12 updated frequently and since
fedora 9 i can't really use my wifi as i want.
I have an atheros card:

05:00.0 Ethernet controller: Atheros Communications Inc. AR242x
802.11abg Wireless PCI Express Adapter (rev 01)

running latest kernel:

Linux daneel 2.6.31.12-174.2.3.fc12.i686 #1 SMP Mon Jan 18 20:22:46 UTC
2010 i686 athlon i386 GNU/Linux

the wifi power on, connect to the AP and then get intermittent
connection flooding the dmesg with:
...
ath5k phy0: noise floor calibration timeout (2442MHz)
ath5k phy0: noise floor calibration timeout (2442MHz)
ath5k phy0: noise floor calibration timeout (2442MHz)
ath5k phy0: unsupported jumbo
ath5k phy0: noise floor calibration timeout (2442MHz)
ath5k phy0: noise floor calibration timeout (2442MHz)
ath5k phy0: noise floor calibration timeout (2442MHz)
ath5k phy0: noise floor calibration timeout (2442MHz)
ath5k phy0: noise floor calibration timeout (2442MHz)
...

and every line (approximately every minute or so) i loose my connection
for about 30sec to a minute.
Due to this the wifi card is unusable.

I found that this problem should be fixed at least in 2.6.27 kernel:
http://www.kerneltrap.org/mailarchive/linux-ath5k-devel/2008/11/27/4246164

So if anyone can help me pointing to some links, recompiling the module
or loading it with some special parameter is very very very welcome!

Thanks a lot

Pietro