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Subject[PATCH] net: core: Fix to store new mtu setting in netdevice.
Date
Store newly configured mtu settings in the netdevice after mtu
configuration is successful to the dsa switch.

Fixes: 2315dc91a5 ("net: make dev_set_mtu() honor notification return code")
Signed-off-by: Murali Krishna Policharla <murali.policharla@broadcom.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
---
net/core/dev.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 722d50d..58617aa 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -7586,12 +7586,15 @@ int dev_change_flags(struct net_device *dev, unsigned int flags)
int __dev_set_mtu(struct net_device *dev, int new_mtu)
{
const struct net_device_ops *ops = dev->netdev_ops;
+ int ret = 0;

if (ops->ndo_change_mtu)
- return ops->ndo_change_mtu(dev, new_mtu);
+ ret = ops->ndo_change_mtu(dev, new_mtu);

- dev->mtu = new_mtu;
- return 0;
+ if (ret >= 0)
+ dev->mtu = new_mtu;
+
+ return ret;
}
EXPORT_SYMBOL(__dev_set_mtu);

--
1.9.1
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