em: Don't update TDT upon very packets transmitted
authorSepherosa Ziehau <sephe@dragonflybsd.org>
Fri, 28 Dec 2012 07:12:02 +0000 (15:12 +0800)
committerSepherosa Ziehau <sephe@dragonflybsd.org>
Fri, 28 Dec 2012 07:12:02 +0000 (15:12 +0800)
commit893bb181c090d408f132963afc9917e844dfd9e8
treef023b420d785925d0eec6827e1233c10ec566a3c
parent5c5db2490b8609ab27a64a1d8a29fc01a2440158
em: Don't update TDT upon very packets transmitted

Merged following commits on emx(4):
7f32a9b0f8f25e43ab2ae4ee0d82ce69325d3b4b
0aba36eb844503423f414a3235eca72a78dc575a
b691889cfe23462069618f44bcf2ba0e71dcbb79

With following exception:
This optimization is not performed for 82547
sys/dev/netif/em/if_em.c
sys/dev/netif/em/if_em.h