forcedeth: optimize the xmit with unlikely

In xmit, it is very impossible that TX_ERROR occurs. So using
unlikely optimizes the xmit process.

CC: Srinivas Eeda <srinivas.eeda@oracle.com>
CC: Joe Jin <joe.jin@oracle.com>
CC: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Zhu Yanjun 2017-11-28 01:42:22 -05:00 • committed by David S. Miller
commit b78a6aa387