Make sure the rx ring lwm is set to at least 4. As far as we know, all
authorkettenis <kettenis@openbsd.org>
Tue, 12 May 2015 20:20:18 +0000 (20:20 +0000)
committerkettenis <kettenis@openbsd.org>
Tue, 12 May 2015 20:20:18 +0000 (20:20 +0000)
commit9a39b166e45206f985fb015f90a387e6545f07ce
tree672b6e476c6949294799808d642999a95ef60994
parentba7954c22692b451289b046a31bfd89baad700fc
Make sure the rx ring lwm is set to at least 4.  As far as we know, all
hardware variants need at least 4 descriptors on the rx ring to be able to
receive packets.  Should fix the issue reported by Christian Schulte on
bugs@.

ok mikeb@, sthen@
sys/dev/pci/if_em.c