[Acx100-devel] USB DMA problems

[Carlos M. <car...@gm...>]

Hi,

 I was testing the driver with USB and was seeing some really strange
behaviour. It took some time but I finally managed to see (more or
less) what's going on.

 If I load acx-20050818, no problems, but when I load 20050821, things
start to go wrong.

 If it uploads the firmware and then fails allocatig DMA memory.
Somthing to the effect of
acx: init memory FAILED
acx: acx100_init_memory_pools FAILED
wlan0: acx100_create_dma_regions FAILED

Now, if it doesn't need to upload the firmware[0] there are no errors,
however, doing ip l produces a "Cannot handle kernel pointer at
address x" message.

This might have to do with the fact that the driver doesn't seem to
bother unregistering the netdev, so I might end up with wlan3, when
the other three (wlan0, wlan1 and wlan2) should no longer be there.

I'll try to get debug logs posted somewhere tomorrow.

[0] This happens when the module is unloaded and then loaded again. As
long as the USB adapter stays plugged-in it will maintain the firmware
in memory and report itself booted.

   cmn
--=20
Carlos Mart=EDn         http://www.cmartin.tk   http://rpgscript.berlios.de

"Vacate your oddly-shaped office and leave. The revolution is coming."