thunderbolt: Log a warning if device links are not found

The software connection manager needs the device links in order to
establish the tunnels before the native protocols so log a warning if
they are not found.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

1 files changed, 13 insertions, 5 deletions

diff --git a/drivers/thunderbolt/acpi.c b/drivers/thunderbolt/acpi.c
index 38fefd0e5268..c9b6bb46111c 100644
--- a/drivers/thunderbolt/acpi.c
+++ b/drivers/thunderbolt/acpi.c
@@ -12,7 +12,7 @@
 #include "tb.h"
 
 static acpi_status tb_acpi_add_link(acpi_handle handle, u32 level, void *data,
-				    void **return_value)
+				    void **ret)
 {
 	struct acpi_device *adev = acpi_fetch_acpi_dev(handle);
 	struct fwnode_handle *fwnode;
@@ -84,6 +84,7 @@ static acpi_status tb_acpi_add_link(acpi_handle handle, u32 level, void *data,
 		if (link) {
 			dev_dbg(&nhi->pdev->dev, "created link from %s\n",
 				dev_name(&pdev->dev));
+			*(bool *)ret = true;
 		} else {
 			dev_warn(&nhi->pdev->dev, "device link creation from %s failed\n",
 				 dev_name(&pdev->dev));
@@ -104,22 +105,29 @@ out_put:
  * Goes over ACPI namespace finding tunneled ports that reference to
  * @nhi ACPI node. For each reference a device link is added. The link
  * is automatically removed by the driver core.
+ *
+ * Returns %true if at least one link was created.
  */
-void tb_acpi_add_links(struct tb_nhi *nhi)
+bool tb_acpi_add_links(struct tb_nhi *nhi)
 {
 	acpi_status status;
+	bool ret = false;
 
 	if (!has_acpi_companion(&nhi->pdev->dev))
-		return;
+		return false;
 
 	/*
 	 * Find all devices that have usb4-host-controller interface
 	 * property that references to this NHI.
 	 */
 	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 32,
-				     tb_acpi_add_link, NULL, nhi, NULL);
-	if (ACPI_FAILURE(status))
+				     tb_acpi_add_link, NULL, nhi, (void **)&ret);
+	if (ACPI_FAILURE(status)) {
 		dev_warn(&nhi->pdev->dev, "failed to enumerate tunneled ports\n");
+		return false;
+	}
+
+	return ret;
 }
 
 /**