[ovs-dev] [PATCH 1/3] datapath: Fix max MTU size on RHEL 7.5 kernel

Yi-Hung Wei yihung.wei at gmail.com
Tue Jun 12 00:50:21 UTC 2018


Without the patch, in RHEL 7.5, the maximum configurable MTU of vport
internal device is 1500, which shall be 65535.  This patch fixes this
issue.

Fixes: 39ca338374ab ("datapath: compat: Fix build on RHEL 7.5")
Reported-by: Lucas Alvares Gomes <lucasagomes at gmail.com>
Signed-off-by: Yi-Hung Wei <yihung.wei at gmail.com>
---
 datapath/vport-internal_dev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/datapath/vport-internal_dev.c b/datapath/vport-internal_dev.c
index 3cb8d06b2475..3fa86815c7fa 100644
--- a/datapath/vport-internal_dev.c
+++ b/datapath/vport-internal_dev.c
@@ -169,6 +169,8 @@ static void do_setup(struct net_device *netdev)
 
 #ifdef HAVE_NET_DEVICE_WITH_MAX_MTU
 	netdev->max_mtu = ETH_MAX_MTU;
+#elif HAVE_RHEL7_MAX_MTU
+	netdev->extended->max_mtu = ETH_MAX_MTU;
 #endif
 	netdev->netdev_ops = &internal_dev_netdev_ops;
 
-- 
2.7.4



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