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It was been observed that with a particular order of initialisation, the netdev can be up, but the SFP module still has its TX_DISABLE signal asserted. This occurs when the network device brought up before the SFP kernel module has been inserted by userspace. This occurs because sfp-bus layer does not hear about the change in network device state, and so assumes that it is still down. Set netdev->sfp when the upstream is registered to work around this problem. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by: David S. Miller <davem@davemloft.net>