From: Sameeh Jubran <sameehj@amazon.com>
Date: Wed, 3 Jun 2020 08:50:22 +0000
Subject: net: ena: xdp: XDP_TX: fix memory leak
Patch-mainline: v5.8-rc1
Git-commit: cd07ecccba13b8bd5023ffe7be57363d07e3105f
References: bsc#1174852

When sending very high packet rate, the XDP tx queues can get full and
start dropping packets. In this case we don't free the pages which
results in ena driver draining the system memory.

Fix:
Simply free the pages when necessary.

Fixes: 548c4940b9f1 ("net: ena: Implement XDP_TX action")
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -359,7 +359,7 @@ error_unmap_dma:
 	ena_unmap_tx_buff(xdp_ring, tx_info);
 	tx_info->xdpf = NULL;
 error_drop_packet:
-
+	__free_page(tx_info->xdp_rx_page);
 	return NETDEV_TX_OK;
 }