cns3xxx: ethernet - clean the tx ring before refilling the rx ring to reduce memory...

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35953 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c b/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c
index 9c3618f..db15a2e 100644 (file)
--- a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c
+++ b/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c
@@ -718,6 +718,10 @@ static int eth_poll(struct napi_struct *napi, int budget)
                enable_irq(IRQ_CNS3XXX_SW_R0RXC);
        }
 
+       spin_lock_bh(&tx_lock);
+       eth_complete_tx(sw);
+       spin_unlock_bh(&tx_lock);
+
        cns3xxx_alloc_rx_buf(sw, received);
 
        rx_ring->cur_index = i;
@@ -725,10 +729,6 @@ static int eth_poll(struct napi_struct *napi, int budget)
        wmb();
        enable_rx_dma(sw);
 
-       spin_lock_bh(&tx_lock);
-       eth_complete_tx(sw);
-       spin_unlock_bh(&tx_lock);
-
        return received;
 }