NAPI note (was Re: lockups with 2.4.20 (tg3? net/core/dev.c|deliver_to_old_ones))

[Jeff Garzik <jgarzik@xxxxxxxxx>]

Manfred Spraul wrote:
> It seems to be a generic NAPI restriction:
> The caller of netif_receive_skb() must not own a spinlock that is 
> acquired from an interrupt handler.


Thanks much for noticing this, Manfred.  tg3 is definitely buggy in this 
regard.  I've CC'd netdev as an FYI...  We should probably patch 
NAPI_HOWTO for this note.

I note that David pointed this out as an area for improvement, so he was 
already thinking in this direction anyway :)

        Jeff