diff mbox series

[net,07/15] net/mlx5e: kTLS, Fix page refcnt leak in TX resync error flow

Message ID 20191018193737.13959-8-saeedm@mellanox.com
State Accepted
Delegated to: David Miller
Headers show
Series [net,01/15] net/mlx5e: Tx, Fix assumption of single WQEBB of NOP in cleanup flow | expand

Commit Message

Saeed Mahameed Oct. 18, 2019, 7:38 p.m. UTC 
From: Tariq Toukan <tariqt@mellanox.com>

All references for frag pages that are obtained in tx_sync_info_get()
should be released.
Release usually occurs in the corresponding CQE of the WQE.
In error flows, not all fragments have a WQE posted for them, hence
no matching CQE will be generated.
For these pages, release the reference in the error flow.

Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
index 334808b1863b..5f1d18fb644e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c
@@ -329,7 +329,7 @@  mlx5e_ktls_tx_handle_ooo(struct mlx5e_ktls_offload_context_tx *priv_tx,
 	struct tx_sync_info info = {};
 	u16 contig_wqebbs_room, pi;
 	u8 num_wqebbs;
-	int i;
+	int i = 0;
 
 	if (!tx_sync_info_get(priv_tx, seq, &info)) {
 		/* We might get here if a retransmission reaches the driver
@@ -364,7 +364,7 @@  mlx5e_ktls_tx_handle_ooo(struct mlx5e_ktls_offload_context_tx *priv_tx,
 
 	tx_post_resync_params(sq, priv_tx, info.rcd_sn);
 
-	for (i = 0; i < info.nr_frags; i++)
+	for (; i < info.nr_frags; i++)
 		if (tx_post_resync_dump(sq, &info.frags[i], priv_tx->tisn, !i))
 			goto err_out;
 
@@ -377,6 +377,9 @@  mlx5e_ktls_tx_handle_ooo(struct mlx5e_ktls_offload_context_tx *priv_tx,
 	return skb;
 
 err_out:
+	for (; i < info.nr_frags; i++)
+		put_page(skb_frag_page(&info.frags[i]));
+
 	dev_kfree_skb_any(skb);
 	return NULL;
 }