octeontx2-af: Fix devlink unregister

Exact match feature is only available in CN10K-B.
Unregister exact match devlink entry only for
this silicon variant.

Fixes: 87e4ea2 ("octeontx2-af: Debugsfs support for exact match.")
Signed-off-by: Ratheesh Kannoth <rkannoth@marvell.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Link: https://lore.kernel.org/r/20230131061659.1025137-1-rkannoth@marvell.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c

@@ -1500,6 +1500,9 @@ static const struct devlink_param rvu_af_dl_params[] = {
 			     BIT(DEVLINK_PARAM_CMODE_RUNTIME),
 			     rvu_af_dl_dwrr_mtu_get, rvu_af_dl_dwrr_mtu_set,
 			     rvu_af_dl_dwrr_mtu_validate),
+};
+
+static const struct devlink_param rvu_af_dl_param_exact_match[] = {
 	DEVLINK_PARAM_DRIVER(RVU_AF_DEVLINK_PARAM_ID_NPC_EXACT_FEATURE_DISABLE,
 			     "npc_exact_feature_disable", DEVLINK_PARAM_TYPE_STRING,
 			     BIT(DEVLINK_PARAM_CMODE_RUNTIME),
@@ -1556,7 +1559,6 @@ int rvu_register_dl(struct rvu *rvu)
 {
 	struct rvu_devlink *rvu_dl;
 	struct devlink *dl;
-	size_t size;
 	int err;
 
 	dl = devlink_alloc(&rvu_devlink_ops, sizeof(struct rvu_devlink),
@@ -1578,21 +1580,32 @@ int rvu_register_dl(struct rvu *rvu)
 		goto err_dl_health;
 	}
 
+	err = devlink_params_register(dl, rvu_af_dl_params, ARRAY_SIZE(rvu_af_dl_params));
+	if (err) {
+		dev_err(rvu->dev,
+			"devlink params register failed with error %d", err);
+		goto err_dl_health;
+	}
+
 	/* Register exact match devlink only for CN10K-B */
-	size = ARRAY_SIZE(rvu_af_dl_params);
 	if (!rvu_npc_exact_has_match_table(rvu))
-		size -= 1;
+		goto done;
 
-	err = devlink_params_register(dl, rvu_af_dl_params, size);
+	err = devlink_params_register(dl, rvu_af_dl_param_exact_match,
+				      ARRAY_SIZE(rvu_af_dl_param_exact_match));
 	if (err) {
 		dev_err(rvu->dev,
-			"devlink params register failed with error %d", err);
-		goto err_dl_health;
+			"devlink exact match params register failed with error %d", err);
+		goto err_dl_exact_match;
 	}
 
+done:
 	devlink_register(dl);
 	return 0;
 
+err_dl_exact_match:
+	devlink_params_unregister(dl, rvu_af_dl_params, ARRAY_SIZE(rvu_af_dl_params));
+
 err_dl_health:
 	rvu_health_reporters_destroy(rvu);
 	devlink_free(dl);
@@ -1605,8 +1618,14 @@ void rvu_unregister_dl(struct rvu *rvu)
 	struct devlink *dl = rvu_dl->dl;
 
 	devlink_unregister(dl);
-	devlink_params_unregister(dl, rvu_af_dl_params,
-				  ARRAY_SIZE(rvu_af_dl_params));
+
+	devlink_params_unregister(dl, rvu_af_dl_params, ARRAY_SIZE(rvu_af_dl_params));
+
+	/* Unregister exact match devlink only for CN10K-B */
+	if (rvu_npc_exact_has_match_table(rvu))
+		devlink_params_unregister(dl, rvu_af_dl_param_exact_match,
+					  ARRAY_SIZE(rvu_af_dl_param_exact_match));
+
 	rvu_health_reporters_destroy(rvu);
 	devlink_free(dl);
 }