This patch adds rx_ring_free function support for GbEthernet
found on RZ/G2L SoC.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
drivers/net/ethernet/renesas/ravb_main.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 2c375002ebcb..038af36141bb 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -236,7 +236,27 @@ static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
static void ravb_rx_ring_free_rgeth(struct net_device *ndev, int q)
{
- /* Place holder */
+ struct ravb_private *priv = netdev_priv(ndev);
+ unsigned int ring_size;
+ unsigned int i;
+
+ if (!priv->rgeth_rx_ring[q])
+ return;
+
+ for (i = 0; i < priv->num_rx_ring[q]; i++) {
+ struct ravb_rx_desc *desc = &priv->rgeth_rx_ring[q][i];
+
+ if (!dma_mapping_error(ndev->dev.parent,
+ le32_to_cpu(desc->dptr)))
+ dma_unmap_single(ndev->dev.parent,
+ le32_to_cpu(desc->dptr),
+ RGETH_RX_BUFF_MAX,
+ DMA_FROM_DEVICE);
+ }
+ ring_size = sizeof(struct ravb_rx_desc) * (priv->num_rx_ring[q] + 1);
+ dma_free_coherent(ndev->dev.parent, ring_size, priv->rgeth_rx_ring[q],
+ priv->rx_desc_dma[q]);
+ priv->rgeth_rx_ring[q] = NULL;
}
static void ravb_rx_ring_free(struct net_device *ndev, int q)
--
2.17.1
