Commit 73e6cdcf authored Jul 04, 2011 by Michael Buesch Committed by John W. Linville Jul 05, 2011

b43: Add RX side DMA memory barrier



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 <m@bues.ch>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

parent 14205aa2

drivers/net/wireless/b43/dma.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -1600,6 +1600,7 @@ 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;
		}