On Sun, Jun 25, 2023, at 18:58, Sardonimous wrote: > I have been unable to get DMA to work in the past. So I have been > configuring it with PIO=1 (/etc/modprobe,d/b43.conf): > > options b43 pio=1 qos=0 > I think the qos=0 parameter is what causes the WARN_ON(), as that causes the use of only one queue, while the warning happens when tx function iterates over all the queues and warns that they don't exist. Arnd