See "ixl_detect_sparse()" in the FreeBSD ixl driver: https://svnweb.freebsd.org/base/head/sys/dev/ixl/ixl_txrx.c?view=markup#l155 https://svnweb.freebsd.org/bas

See "ixl_detect_sparse()" in the FreeBSD ixl driver: https://svnweb.freebsd.org/base/head/sys/dev/ixl/ixl_txrx.c?view=markup#l155 https://svnweb.freebsd.org/base/head/sys/dev/ixl/ixl_txrx.c?... Or __i40e_chk_linearize in the Linux i40e driver: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/net/ethernet/intel/i40e/i40e_txrx.c#n3257 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin... And their 100g NIC has the same bug (at least according to the FreeBSD driver that's in review now). ARGH!