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realtek: correct l2 offloading tag handling 

Makes sure the DSA trailer information on any L2 offloading done
by the switch is honoured by the bridge layer

Signed-off-by: Birger Koblitz <git@birger-koblitz.de>
This commit is contained in:
Birger Koblitz 2021-01-21 14:32:44 +01:00 committed by Petr Štetiar
parent dc9cc0d3e2
commit 56ac4fced0
1 changed files with 7 additions and 4 deletions
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11
target/linux/realtek/patches-5.4/701-net-dsa-add-rtl838x-support-for-tag-trailer.patch
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@ -9,21 +9,24 @@
+ trailer[1] = dp->index;
+#else
trailer[1] = 1 << dp->index;
+#endif /* CONFIG_NET_DSA_RTL83XX */
+#endif /* CONFIG_NET_DSA_RTL838X */
trailer[2] = 0x10;
trailer[3] = 0x00;
@@ -61,12 +66,20 @@ static struct sk_buff *trailer_rcv(struc
@@ -61,12 +69,23 @@ static struct sk_buff *trailer_rcv(struc
return NULL;
trailer = skb_tail_pointer(skb) - 4;
+
+#ifdef CONFIG_NET_DSA_RTL83XX
+ if (trailer[0] != 0x80 || (trailer[1] & 0xe0) != 0x00 ||
+ if (trailer[0] != 0x80 || (trailer[1] & 0x80) != 0x00 ||
+ (trailer[2] & 0xef) != 0x00 || trailer[3] != 0x00)
+ return NULL;
+
+ source_port = trailer[1] & 0x1f;
+ if (trailer[1] & 0x40)
+ skb->offload_fwd_mark = 1;
+
+ source_port = trailer[1] & 0x3f;
+#else
if (trailer[0] != 0x80 || (trailer[1] & 0xf8) != 0x00 ||
(trailer[2] & 0xef) != 0x00 || trailer[3] != 0x00)