igb_maybe_stop_tx() is extremely small and appears in several spots in
the tx hotpath. This change inlines the function for a possible
performance boost.
Signed-off-by: NNicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>