net/mlx5e: fix return value check in mlx5e_ipsec_remove_trailer()

mlx5e_ipsec_remove_trailer() should return an error code if function
pskb_trim() returns an unexpected value.

Fixes: 2ac9cfe ("net/mlx5e: IPSec, Add Innova IPSec offload TX data path")
Signed-off-by: Yuanjun Gong <[email protected]>
Reviewed-by: Leon Romanovsky <[email protected]>
Signed-off-by: Saeed Mahameed <[email protected]>

Author: AnnYugawa

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_rxtx.c

@@ -58,7 +58,9 @@ static int mlx5e_ipsec_remove_trailer(struct sk_buff *skb, struct xfrm_state *x)
 
 	trailer_len = alen + plen + 2;
 
-	pskb_trim(skb, skb->len - trailer_len);
+	ret = pskb_trim(skb, skb->len - trailer_len);
+	if (unlikely(ret))
+		return ret;
 	if (skb->protocol == htons(ETH_P_IP)) {
 		ipv4hdr->tot_len = htons(ntohs(ipv4hdr->tot_len) - trailer_len);
 		ip_send_check(ipv4hdr);