stmmac: add tx_skbuff_dma to save descriptors used by PTP

[firefly-linux-kernel-4.4.55.git] / drivers / net / ethernet / stmicro / stmmac / ring_mode.c

diff --git a/drivers/net/ethernet/stmicro/stmmac/ring_mode.c b/drivers/net/ethernet/stmicro/stmmac/ring_mode.c
index 8a5e661f4fda5a2d6bad252f97d614ff202c48b0..43fc699b21cc6bd09ad02e2a4308e6a2c1b1940e 100644 (file)
--- a/drivers/net/ethernet/stmicro/stmmac/ring_mode.c
+++ b/drivers/net/ethernet/stmicro/stmmac/ring_mode.c
@@ -48,6 +48,7 @@ static unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
 
                desc->des2 = dma_map_single(priv->device, skb->data,
                                            bmax, DMA_TO_DEVICE);
+               priv->tx_skbuff_dma[entry] = desc->des2;
                desc->des3 = desc->des2 + BUF_SIZE_4KiB;
                priv->hw->desc->prepare_tx_desc(desc, 1, bmax, csum,
                                                STMMAC_RING_MODE);
@@ -57,6 +58,7 @@ static unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
 
                desc->des2 = dma_map_single(priv->device, skb->data + bmax,
                                            len, DMA_TO_DEVICE);
+               priv->tx_skbuff_dma[entry] = desc->des2;
                desc->des3 = desc->des2 + BUF_SIZE_4KiB;
                priv->hw->desc->prepare_tx_desc(desc, 0, len, csum,
                                                STMMAC_RING_MODE);
@@ -66,6 +68,7 @@ static unsigned int stmmac_jumbo_frm(void *p, struct sk_buff *skb, int csum)
        } else {
                desc->des2 = dma_map_single(priv->device, skb->data,
                                            nopaged_len, DMA_TO_DEVICE);
+               priv->tx_skbuff_dma[entry] = desc->des2;
                desc->des3 = desc->des2 + BUF_SIZE_4KiB;
                priv->hw->desc->prepare_tx_desc(desc, 1, nopaged_len, csum,
                                                STMMAC_RING_MODE);