[dpdk-stable] [PATCH] net/sfc: cut non VLAN ID bits from TCI

[Andrew Rybchenko <arybchenko@solarflare.com>]

TCI may contain PCP or DEI bits. Matching of these bits is not
supported, but the bits still may be set in specification value and
not covered by mask. So, these bits should be ignored.

Fixes: 894080975e1e ("net/sfc: support VLAN in flow API filters")
Cc: stable@dpdk.org

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Roman Zhukov <roman.zhukov@oktetlabs.ru>
---
 drivers/net/sfc/sfc_flow.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/sfc/sfc_flow.c b/drivers/net/sfc/sfc_flow.c
index 5613d59a9..18387415e 100644
--- a/drivers/net/sfc/sfc_flow.c
+++ b/drivers/net/sfc/sfc_flow.c
@@ -371,7 +371,8 @@ sfc_flow_parse_vlan(const struct rte_flow_item *item,
 	 * the outer tag and the next matches the inner tag.
 	 */
 	if (mask->tci == supp_mask.tci) {
-		vid = rte_bswap16(spec->tci);
+		/* Apply mask to keep VID only */
+		vid = rte_bswap16(spec->tci & mask->tci);
 
 		if (!(efx_spec->efs_match_flags &
 		      EFX_FILTER_MATCH_OUTER_VID)) {
-- 
2.17.1