4.9-stable review patch. If anyone has any objections, please let me know.
------------------
[ Upstream commit 45c8184c1bed1ca8a7f02918552063a00b909bf5 ]
Update the features after calling register_netdev() otherwise the device features are not set up correctly and it not possible to change the MTU of the device. After this change, the features reported by ethtool match the device's features before the commit which introduced the issue and it is possible to change the device's MTU.
Fixes: f599c64fdf7d ("xen-netfront: Fix race between device setup and open") Reported-by: Liam Shepherd liam@dancer.es Signed-off-by: Ross Lagerwall ross.lagerwall@citrix.com Reviewed-by: Juergen Gross jgross@suse.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/xen-netfront.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index 3c1adb38412b..c85edd161a6c 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -1994,10 +1994,6 @@ static int xennet_connect(struct net_device *dev) /* talk_to_netback() sets the correct number of queues */ num_queues = dev->real_num_tx_queues;
- rtnl_lock(); - netdev_update_features(dev); - rtnl_unlock(); - if (dev->reg_state == NETREG_UNINITIALIZED) { err = register_netdev(dev); if (err) { @@ -2007,6 +2003,10 @@ static int xennet_connect(struct net_device *dev) } }
+ rtnl_lock(); + netdev_update_features(dev); + rtnl_unlock(); + /* * All public and private state should now be sane. Get * ready to start sending and receiving packets and give the driver