ibmvnic: Wait for device response when changing MAC
Wait for a response from the VNIC server before exiting after setting the MAC address. The resolves an issue with bonding a VNIC client in ALB or TLB modes. The bonding driver was changing the MAC address more rapidly than the device could respond, causing the following errors. "bond0: the hw address of slave eth2 is in use by the bond; couldn't find a slave with a free hw address to give it (this should not have happened)" If the function waits until the change is finalized, these errors are avoided. Signed-off-by: NThomas Falcon <tlfalcon@linux.vnet.ibm.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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