netdev - [PATCH net 2/2] ice: Fix XDP memory leak when NIC is brought up and down

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Message-Id: <20230608200051.451752-3-anthony.l.nguyen@intel.com>
Date: Thu,  8 Jun 2023 13:00:51 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	netdev@...r.kernel.org
Cc: Kamil Maziarz <kamil.maziarz@...el.com>,
	anthony.l.nguyen@...el.com,
	maciej.fijalkowski@...el.com,
	magnus.karlsson@...el.com,
	ast@...nel.org,
	daniel@...earbox.net,
	hawk@...nel.org,
	john.fastabend@...il.com,
	bpf@...r.kernel.org,
	Chandan Kumar Rout <chandanx.rout@...el.com>
Subject: [PATCH net 2/2] ice: Fix XDP memory leak when NIC is brought up and down

From: Kamil Maziarz <kamil.maziarz@...el.com>

Fix the buffer leak that occurs while switching
the port up and down with traffic and XDP by
checking for an active XDP program and freeing all empty TX buffers.

Fixes: efc2214b6047 ("ice: Add support for XDP")
Signed-off-by: Kamil Maziarz <kamil.maziarz@...el.com>
Tested-by: Chandan Kumar Rout <chandanx.rout@...el.com> (A Contingent Worker at Intel)
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index a1f7c8edc22f..03513d4871ab 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -7056,6 +7056,10 @@ int ice_down(struct ice_vsi *vsi)
 	ice_for_each_txq(vsi, i)
 		ice_clean_tx_ring(vsi->tx_rings[i]);
 
+	if (ice_is_xdp_ena_vsi(vsi))
+		ice_for_each_xdp_txq(vsi, i)
+			ice_clean_tx_ring(vsi->xdp_rings[i]);
+
 	ice_for_each_rxq(vsi, i)
 		ice_clean_rx_ring(vsi->rx_rings[i]);
 
-- 
2.38.1