diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c index cc160fe9f817..462e08c3d09d 100644 --- a/drivers/net/wireless/ath9k/recv.c +++ b/drivers/net/wireless/ath9k/recv.c @@ -519,6 +519,15 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush) if (!skb) continue; + /* + * Synchronize the DMA transfer with CPU before + * 1. accessing the frame + * 2. requeueing the same buffer to h/w + */ + pci_dma_sync_single_for_cpu(sc->pdev, bf->bf_buf_addr, + sc->rx.bufsize, + PCI_DMA_FROMDEVICE); + /* * If we're asked to flush receive queue, directly * chain it back at the queue without processing it. @@ -547,10 +556,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush) if (!requeue_skb) goto requeue; - /* Sync and unmap the frame */ - pci_dma_sync_single_for_cpu(sc->pdev, bf->bf_buf_addr, - sc->rx.bufsize, - PCI_DMA_FROMDEVICE); + /* Unmap the frame */ pci_unmap_single(sc->pdev, bf->bf_buf_addr, sc->rx.bufsize, PCI_DMA_FROMDEVICE);