From: Thomas Graf <tgraf@suug.ch>
Date: Wed, 4 Feb 2015 16:00:04 +0000 (+0100)
Subject: vxlan: Only set has-GBP bit in header if any other bits would be set
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=db79a621835ee91d3e10177abd97f48e0a4dcf9b;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

vxlan: Only set has-GBP bit in header if any other bits would be set

This allows for a VXLAN-GBP socket to talk to a Linux VXLAN socket by
not setting any of the bits.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index c184717e8b28..d08072c10aa9 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1667,6 +1667,9 @@ static void vxlan_build_gbp_hdr(struct vxlanhdr *vxh, u32 vxflags,
 {
 	struct vxlanhdr_gbp *gbp;
 
+	if (!md->gbp)
+		return;
+
 	gbp = (struct vxlanhdr_gbp *)vxh;
 	vxh->vx_flags |= htonl(VXLAN_HF_GBP);