firmware: ti_sci: Parse all resource ranges even if some is not available

Do not fail if any of the requested subtypes are not availabe, but set the
number of resources to 0 and continue parsing the resource ranges.

Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

drivers/firmware/ti_sci.c

@@ -3430,6 +3430,7 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
 	u32 resource_subtype;
 	u16 resource_type;
 	struct ti_sci_resource *res;
+	bool valid_set = false;
 	int sets, i, ret;
 
 	res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL);
@@ -3468,12 +3469,15 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
 							&res->desc[i].start,
 							&res->desc[i].num);
 		if (ret) {
-			dev_err(dev, "type %d subtype %d not allocated for host %d\n",
+			dev_dbg(dev, "type %d subtype %d not allocated for host %d\n",
 				resource_type, resource_subtype,
 				handle_to_ti_sci_info(handle)->host_id);
-			return ERR_PTR(ret);
+			res->desc[i].start = 0;
+			res->desc[i].num = 0;
+			continue;
 		}
 
+		valid_set = true;
 		dev_dbg(dev, "res type = %d, subtype = %d, start = %d, num = %d\n",
 			resource_type, resource_subtype, res->desc[i].start,
 			res->desc[i].num);
@@ -3486,7 +3490,10 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
 	}
 	raw_spin_lock_init(&res->lock);
 
-	return res;
+	if (valid_set)
+		return res;
+
+	return ERR_PTR(-EINVAL);
 }
 EXPORT_SYMBOL_GPL(devm_ti_sci_get_of_resource);