Following patch check if current MTU needs to be changed before
issuing set-mtu ioctl.
Suggested-by: Jesse Gross <je...@nicira.com>
Signed-off-by: Pravin B Shelar <pshe...@nicira.com>
---
lib/netdev-linux.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/lib/netdev-linux.c b/lib/netdev-linux.c
index 19a80fb..4947536 100644
--- a/lib/netdev-linux.c
+++ b/lib/netdev-linux.c
@@ -1030,6 +1030,10 @@ netdev_linux_set_mtu(const struct netdev *netdev_, int
mtu)
struct ifreq ifr;
int error;
+ if (netdev_dev->cache_valid & VALID_MTU &&
+ netdev_dev->mtu == mtu) {
+ return 0;
+ }
ifr.ifr_mtu = mtu;
error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr,
SIOCSIFMTU, "SIOCSIFMTU");
--
1.7.1
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