[PATCH 2/4] net/mlx5/hws: fix GENEVE option class partial mask

[Michael Baum]

When GENEVE option parser is configured, the class field has 3 optional
modes:
1. ignored - ignore this field.
2. fixed - this field is part of option identifier along with type
	   field. In this mode, the exact value is provided in "spec"
	   field during pattern template creation and mask must be 0xffff.
3. matchable - class field isn't part of the identifier and only mask is
	       provided in pattern template creation. The mask can be
	       any value like all other fields.

In current implementation, when class mask isn't 0, pattern template
creation is failed for mask != 0xffff regardless to class mode.

This patch fixes this validation to be only when class mode is fixed.

Fixes: 8f8dad4289e0 ("net/mlx5/hws: support GENEVE options matching")
Cc: valex at nvidia.com
Cc: stable at dpdk.org

Signed-off-by: Michael Baum <michaelba at nvidia.com>
Reviewed-by: Alex Vesker <valex at nvidia.com>
---
 drivers/net/mlx5/hws/mlx5dr_definer.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/mlx5/hws/mlx5dr_definer.c b/drivers/net/mlx5/hws/mlx5dr_definer.c
index 35a2ed2048..f1f544deab 100644
--- a/drivers/net/mlx5/hws/mlx5dr_definer.c
+++ b/drivers/net/mlx5/hws/mlx5dr_definer.c
@@ -2500,11 +2500,6 @@ mlx5dr_definer_conv_item_geneve_opt(struct mlx5dr_definer_conv_data *cd,
 		goto out_not_supp;
 	}
 
-	if (m->option_class && m->option_class != RTE_BE16(UINT16_MAX)) {
-		DR_LOG(ERR, "Geneve option class has invalid mask");
-		goto out_not_supp;
-	}
-
 	ret = mlx5_get_geneve_hl_data(cd->ctx,
 				      v->option_type,
 				      v->option_class,
@@ -2517,6 +2512,11 @@ mlx5dr_definer_conv_item_geneve_opt(struct mlx5dr_definer_conv_data *cd,
 		goto out_not_supp;
 	}
 
+	if (ok_bit_on_class && m->option_class != RTE_BE16(UINT16_MAX)) {
+		DR_LOG(ERR, "Geneve option class has invalid mask");
+		goto out_not_supp;
+	}
+
 	if (!ok_bit_on_class && m->option_class) {
 		/* DW0 is used, we will match type, class */
 		if (!num_of_dws || hl_dws[0].dw_mask != UINT32_MAX) {
-- 
2.25.1