[PATCH 5.15 064/183] net: ena: Flush XDP packets on error.

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>

[ Upstream commit 6f411fb5ca9419090bee6a0a46425e0a5060b734 ]

xdp_do_flush() should be invoked before leaving the NAPI poll function
after a XDP-redirect. This is not the case if the driver leaves via
the error path (after having a redirect in one of its previous
iterations).

Invoke xdp_do_flush() also in the error path.

Cc: Arthur Kiyanovski <akiyano@xxxxxxxxxx>
Cc: David Arinzon <darinzon@xxxxxxxxxx>
Cc: Noam Dagan <ndagan@xxxxxxxxxx>
Cc: Saeed Bishara <saeedb@xxxxxxxxxx>
Cc: Shay Agroskin <shayagr@xxxxxxxxxx>
Fixes: a318c70ad152b ("net: ena: introduce XDP redirect implementation")
Acked-by: Arthur Kiyanovski <akiyano@xxxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Acked-by: Jesper Dangaard Brouer <hawk@xxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index f3673be4fc087..3eba01de95259 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -1788,6 +1788,9 @@ static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
 	return work_done;
 
 error:
+	if (xdp_flags & ENA_XDP_REDIRECT)
+		xdp_do_flush();
+
 	adapter = netdev_priv(rx_ring->netdev);
 
 	if (rc == -ENOSPC) {
-- 
2.40.1






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