[PATCH] b43: use rx desc underrun interrupt

[Michael Büsch]

On Sat, 20 Apr 2013 23:23:54 +0200 (CEST)
Thommy Jakobsson <thommyj at gmail.com> wrote:

> Isn't that exactly what we do in b43_dma_rx? The initial rx descriptor 
> index is just to make the device to start. Theoretically you could get 
> into a fault situation if the device succeds in using up all descriptors 
> between b43_dma_rx_discard (added by my patch) and the call to b43_dma_rx. 
> Because then you could start reading the same packet as the device is 
> writing to.

Yes this is true.
And thus I'm currently unsure why we need this patch at all.
_Why_ does the DMA stall as soon as the ring is filled up?

-- 
Michael
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