Request for testing b43 & Broadcom 14e4:4315 cards for DMA ERRORs (Linux 3.0)

Rafał Miłecki zajec5 at
Mon May 30 03:45:49 EDT 2011

W dniu 30 maja 2011 09:22 użytkownik Rafał Miłecki <zajec5 at> napisał:
> I believe we've fixed that errors in Linux 3.0-rc1. Can you give it a
> chance and report back?

I'd like to say (and you should too) big thanks to Juan, who gave me
access to his affected machine and spent a lot of time testing. He
even bisected kernel on his Atom pointing us to hrtimers regression.

If this is going to work, I've some annoying info for Larry.

I can not tell which of the recent b43/ssb commits were really needed
for solving this issue the final one was "b43: implement timeouts
workaround". The tricky part is we got very similar patch ready 1,5
year ago [0], by Larry!

The mistake done by Larry was applying workaround on PCI(e) core
instead of 80211 core. I've noticed that when comparing
"ssb_read32(SSB_IMCFGLO);" after cold boot between ssb&b43 and wl.
Drivers read different values from hardware, so it was a hint we were
doing this on a wrong core.



More information about the b43-dev mailing list