diff mbox series

[net-next,05/10] net: microchip: sparx5: Improve the error handling for linked rules

Message ID 20230213092426.1331379-6-steen.hegelund@microchip.com (mailing list archive)
State New, archived
Headers show
Series Adding Sparx5 ES0 VCAP support | expand

Commit Message

Steen Hegelund Feb. 13, 2023, 9:24 a.m. UTC 
Ensure that an error is returned if the VCAP instance was not found.
The chain offset (diff) is allowed to be zero as this just means that the
user did not request rules to be linked.

Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
---
 drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
index d73668dcc6b6..82d5138f149e 100644
--- a/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
+++ b/drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.c
@@ -551,12 +551,16 @@  static int sparx5_tc_add_rule_link(struct vcap_control *vctrl,
 	struct vcap_admin *to_admin = vcap_find_admin(vctrl, to_cid);
 	int diff, err = 0;
 
-	diff = vcap_chain_offset(vctrl, from_cid, to_cid);
-	if (!(to_admin && diff > 0)) {
+	if (!to_admin) {
 		pr_err("%s:%d: unsupported chain direction: %d\n",
 		       __func__, __LINE__, to_cid);
 		return -EINVAL;
 	}
+
+	diff = vcap_chain_offset(vctrl, from_cid, to_cid);
+	if (!diff)
+		return 0;
+
 	if (admin->vtype == VCAP_TYPE_IS0 &&
 	    to_admin->vtype == VCAP_TYPE_IS0) {
 		/* Between IS0 instances the G_IDX value is used */