Re: Question about starting up an AP

[Helmut Schaa <helmut.schaa@googlemail.com>]

Hi Joshua,

Am Donnerstag 30 September 2010 schrieb Helmut Schaa:
> Am Donnerstag 30 September 2010 schrieb Joshua Smith:
> > I think I have a clue about the WPDMA TX/RX busy bug.  I was having trouble
> > using the latest compat-wireless with USB dongle I have (ID AB50:2019
> > rt73usb), so I tried rolling Helmut's "oops" fix into:
> > 
> > compat-wireless-2010-07-15
> > 
> > which I have been using successfully for the last few months.  Lo and behold,
> > this version does *NOT* exhibit the TX/RX busy error.  So whatever is causing
> > that problem was introduced between 7/15/2010 and 9/20/2010.
> 
> Thanks for the analysis Joshua! Since this is a regression I guess we
> should try to find out quickly which commit introduced it (and fix it up
> of course) ...

Unfortunately during that time a lot of rt2x00 patches went into
wireless-testing. However, there's one suspicious commit that touches the
relevant code: "rt2x00: Merge rt2800{pci/usb} radio enabling/disabling code
to rt2800lib".

This is again a shot in the dark but worth a try. Could you please revert this
commit [1] from the newer compat-wireless tarball and try if it fixes the "DMA
Busy" issue?

Thanks Joshua,
Helmut

[1] http://git.kernel.org/?p=linux/kernel/git/linville/wireless-testing.git;a=commit;h=b9a07ae9d9e09662013992088fd58ffbcb2f9a30