Me and a couple of my friends work on small freebsd version for embedded systems. We all noticed that our wifi cards with atheros chip have problems with the ath driver. The system keeps on spitting out following messages before the link, that is already very slow dies:
ath_rate_ctl: 54M -> 48M (0 ok, 3 err, 3 retr) ath_rate_ctl: 48M -> 36M (0 ok, 1 err, 1 retr) ath_rate_ctl: 36M -> 24M (0 ok, 1 err, 1 retr) ath_rate_ctl: 24M -> 36M (11 ok, 0 err, 0 retr) ath_rate_ctl: 36M -> 48M (23 ok, 0 err, 0 retr) ath_rate_ctl: 48M -> 36M (0 ok, 2 err, 2 retr) ath_rate_ctl: 36M -> 24M (3 ok, 7 err, 7 retr) ath_rate_ctl: 24M -> 18M (0 ok, 1 err, 1 retr)
And ping requests end up with following message: ping: sendto: No buffer space available
This was tested running 11a and 11g with PCMCIA and mini-PCI cards.
hw.ath.hal.version: 0.9.5.2 ath0: <Atheros 5212> mem 0x88010000-0x8801ffff irq 11 at device 0.0 on cardbus1 FreeBSD 5.1-CURRENT #0: Wed Aug 20 16:59:24 CEST 2003
Any solution for that Sam? I can remember you mentioned you have fix for that a couple of weeks ago and that you will submit it in a week time or so.
I have seen the problem but have been unable to resolve it. Grab a copy of /usr/src/tools/tools/ath/athstats and use it to look at the statistics kept by the driver when this happens. They may give a hint but unfortunately I think it's a problem with the anti-noise-immunity (ANI) code in the HAL and I have no time right now to dig into that.
Sam
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