em: remove M_HASHTYPE when RSS is not enabled

Summary:
Since "73fe85e486d2 tcp: store flowid info in syncache", inp_flowid can be set
if the incoming packet is not M_HASHTYPE_NONE. But this can introduce dummy
and duplicated flowid when a virtual interface set M_HASHTYPE_OPAQUE. This
change will let the upper layer know how to deal with software hash, with
benefits like inp_flowid can be set correctly and m_pkthdr.flowid can be set
correctly in output path.

This fix is similar to "20285cad7a55"

Reviewed by: kbowling
Differential Revision: https://reviews.freebsd.org/D55137

1 files changed, 1 insertions, 1 deletions

diff --git a/sys/dev/e1000/em_txrx.c b/sys/dev/e1000/em_txrx.c
index 647255417b3e..b86222e363e9 100644
--- a/sys/dev/e1000/em_txrx.c
+++ b/sys/dev/e1000/em_txrx.c
@@ -836,6 +836,6 @@ em_determine_rsstype(uint32_t pkt_info)
 	case E1000_RXDADV_RSSTYPE_IPV6_TCP_EX:
 		return M_HASHTYPE_RSS_TCP_IPV6_EX;
 	default:
-		return M_HASHTYPE_OPAQUE;
+		return M_HASHTYPE_NONE;
 	}
 }