ath11k: Remove unnecessary data sync to cpu on monitor buffer

Monitor ring Rx buffer is not really modified between dma map
and unmap. So remove the unnecssary data sync before dma unmap.
This does not fix any visible issue, found in code review.

Compile tested only.

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1602744454-22969-1-git-send-email-vthiagar@codeaurora.org

diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
index 571722baa0b3e4571d78991fede72d44b4aee123..d23b152ddcdd0e04789f6d7a0acef293758ab10f 100644 (file)
--- a/drivers/net/wireless/ath/ath11k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
@@ -2856,10 +2856,6 @@ static int ath11k_dp_rx_reap_mon_status_ring(struct ath11k_base *ab, int mac_id,
 
                        rxcb = ATH11K_SKB_RXCB(skb);
 
-                       dma_sync_single_for_cpu(ab->dev, rxcb->paddr,
-                                               skb->len + skb_tailroom(skb),
-                                               DMA_FROM_DEVICE);
-
                        dma_unmap_single(ab->dev, rxcb->paddr,
                                         skb->len + skb_tailroom(skb),
                                         DMA_BIDIRECTIONAL);