Stefan Sperling wrote: > Properly reset the RX ring by clearing RX buffer status exposed to hardware. > Found by Matthew Dillon while porting FreeBSD's iwm(4) to Dragonfly. > > ok? > > Index: if_iwm.c > =================================================================== > RCS file: /cvs/src/sys/dev/pci/if_iwm.c,v > retrieving revision 1.46 > diff -u -p -r1.46 if_iwm.c > --- if_iwm.c 19 Jul 2015 21:40:00 -0000 1.46 > +++ if_iwm.c 22 Sep 2015 16:52:10 -0000 > @@ -1046,6 +1046,7 @@ iwm_reset_rx_ring(struct iwm_softc *sc, > iwm_nic_unlock(sc); > } > ring->cur = 0; > + memset(ring->stat, 0, sizeof(*ring->stat)); > }
do we need any sort of dma sync?
