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- From: Felix Fietkau <[email protected]>
- Date: Tue, 27 Dec 2022 15:02:51 +0100
- Subject: [PATCH] net: ethernet: mtk_eth_soc: ppe: fix L2 offloading with DSA
- untagging offload enabled
- Check for skb metadata in order to detect the case where the DSA header is not
- present.
- Fixes: 2d7605a72906 ("net: ethernet: mtk_eth_soc: enable hardware DSA untagging")
- Signed-off-by: Felix Fietkau <[email protected]>
- ---
- --- a/drivers/net/ethernet/mediatek/mtk_ppe.c
- +++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
- @@ -8,6 +8,7 @@
- #include <linux/platform_device.h>
- #include <linux/if_ether.h>
- #include <linux/if_vlan.h>
- +#include <net/dst_metadata.h>
- #include <net/dsa.h>
- #include "mtk_eth_soc.h"
- #include "mtk_ppe.h"
- @@ -781,7 +782,9 @@ void __mtk_ppe_check_skb(struct mtk_ppe
- skb->dev->dsa_ptr->tag_ops->proto != DSA_TAG_PROTO_MTK)
- goto out;
-
- - tag += 4;
- + if (!skb_metadata_dst(skb))
- + tag += 4;
- +
- if (get_unaligned_be16(tag) != ETH_P_8021Q)
- break;
-
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