wil6210: Optimize Tx completion

No need to modify HW descriptor, as it will be re-initialized on Tx.

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/wil6210/txrx.c b/drivers/net/wireless/ath/wil6210/txrx.c
index 8fde73a..dd5f35e 100644 (file)
--- a/drivers/net/wireless/ath/wil6210/txrx.c
+++ b/drivers/net/wireless/ath/wil6210/txrx.c
@@ -855,10 +855,12 @@ int wil_tx_complete(struct wil6210_priv *wil, int ringid)
                } else {
                        dma_unmap_page(dev, pa, dmalen, DMA_TO_DEVICE);
                }
-               d->dma.addr.addr_low = 0;
-               d->dma.addr.addr_high = 0;
-               d->dma.length = 0;
-               d->dma.status = TX_DMA_STATUS_DU;
+               /*
+                * There is no need to touch HW descriptor:
+                * - ststus bit TX_DMA_STATUS_DU is set by design,
+                *   so hardware will not try to process this desc.,
+                * - rest of descriptor will be initialized on Tx.
+                */
                vring->swtail = wil_vring_next_tail(vring);
                done++;
        }