bnx2: Check if_running() before touching chip registers.
Add this check to bnx2_netif_stop() and bnx2_vlan_rx_register() to prevent bus lockups on some systems when the chip is in low power state. Signed-off-by: NMichael Chan <mchan@broadcom.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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