Add checking of l4_csum_checked and frag flags before checking the
l4_csum_error flag.
In case of IP fragment/unchecked L4 csum - add PKT_RX_L4_CKSUM_UNKNOWN
flag to the indicated mbuf.
Fixes: 1173fca25af9 ("ena: add polling-mode driver")
Cc: stable@dpdk.org
Signed-off-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Maciej Bielski <mba@semihalf.com>
Reviewed-by: Michal Krawczyk <mk@semihalf.com>