[RFC PATCH 03/22] thunderbolt: Log warning if adding switch fails

[Mika Westerberg]

If we fail to add a switch for some reason log a warning with the error
code. This is useful for debugging.

Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
 drivers/thunderbolt/tb.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 1f7a9e1cc09c..541295be9bfc 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -143,6 +143,7 @@ static void tb_scan_port(struct tb_port *port)
 	struct tb_cm *tcm = tb_priv(port->sw->tb);
 	struct tb_port *upstream_port;
 	struct tb_switch *sw;
+	int ret;
 
 	if (tb_is_upstream_port(port))
 		return;
@@ -203,7 +204,9 @@ static void tb_scan_port(struct tb_port *port)
 	if (!tcm->hotplug_active)
 		dev_set_uevent_suppress(&sw->dev, true);
 
-	if (tb_switch_add(sw)) {
+	ret = tb_switch_add(sw);
+	if (ret) {
+		dev_warn(&sw->dev, "failed to register switch: %d\n", ret);
 		tb_switch_put(sw);
 		return;
 	}
-- 
2.23.0