[net 8/8] net/mlx5e: kTLS, Add resiliency to zero-size record frags in TX resync flow

[Saeed Mahameed]

From: Tariq Toukan <tar...@mellanox.com>

SKBs of TLS records might have empty zero-sized frags.
Posting a DUMP WQE for such frag would result an error completion.
Add in-driver resiliency and skip such frags.

Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support")
Signed-off-by: Tariq Toukan <tar...@mellanox.com>
Reviewed-by: Boris Pismenny <bor...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

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 52a56622034a..a04fa23e1a53 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
@@ -232,9 +232,14 @@ tx_sync_info_get(struct mlx5e_ktls_offload_context_tx 
*priv_tx,
        remaining = info->sync_len;
        while (remaining > 0) {
                skb_frag_t *frag = &record->frags[i];
+               unsigned int fsz;
+
+               fsz = skb_frag_size(frag);
+               if (unlikely(!fsz))
+                       continue;
 
                get_page(skb_frag_page(frag));
-               remaining -= skb_frag_size(frag);
+               remaining -= fsz;
                info->frags[i++] = *frag;
        }
        /* reduce the part which will be sent with the original SKB */
-- 
2.25.4