> > > Does it fix the wifi issue too?
> > 
> > Well it works as long as I revert this: 901bb98918 ("nl80211: require and
> > validate vendor command policy"). Which has nothing to do with DMA anyways.
> > 
> > Was this the issue you where seeing?
> > 
> > [    4.969679] WARNING: CPU: 2 PID: 21 at net/wireless/core.c:868
> > wiphy_register+0x8e8/0xbdc [cfg80211]
> > [...]
> > [    4.969974] ieee80211 phy0: brcmf_cfg80211_attach: Could not register
> > wiphy device (-22)
> 
> We're seeing this on different platforms (allwinner / rockchip / amlogic)
> with Broadcom WiFi chips. So it's unlikely to be related with anything in
> this series.
> 
> I believe a fix for this has already been queued up:
> 
> 
https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git/commit/?id=91046d6364afde646734c7ead1f649d253c386e9

Thanks for pointing it out, it fixes the issue alright.