This adds a memory barrier to ensure the writes to the ring memory are committed before the DMA ring pointer is updated. We do a similar thing on the TX side already.
Signed-off-by: Michael Buesch <[email protected]> --- There's no bug report or known breakage (as far as I know) on this, so no CC to stable. Index: linux-2.6.39/drivers/net/wireless/b43/dma.c =================================================================== --- linux-2.6.39.orig/drivers/net/wireless/b43/dma.c 2011-05-19 06:06:34.000000000 +0200 +++ linux-2.6.39/drivers/net/wireless/b43/dma.c 2011-07-04 17:24:56.327210182 +0200 @@ -1599,6 +1599,7 @@ void b43_dma_rx(struct b43_dmaring *ring dma_rx(ring, &slot); update_max_used_slots(ring, ++used_slots); } + wmb(); ops->set_current_rxslot(ring, slot); ring->current_slot = slot; } -- Greetings, Michael. _______________________________________________ b43-dev mailing list [email protected] http://lists.infradead.org/mailman/listinfo/b43-dev
