Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Mika Westerberg <mika.westerberg@linux.intel.com>
To:     linux-usb@vger.kernel.org
Cc:     Andreas Noever <andreas.noever@gmail.com>,
        Michael Jamet <michael.jamet@intel.com>,
        Mika Westerberg <mika.westerberg@linux.intel.com>,
        Yehezkel Bernat <YehezkelShB@gmail.com>,
        Rajmohan Mani <rajmohan.mani@intel.com>,
        Nicholas Johnson <nicholas.johnson-opensource@outlook.com.au>,
        Lukas Wunner <lukas@wunner.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        Mario.Limonciello@dell.com,
        Anthony Wong <anthony.wong@canonical.com>,
        linux-kernel@vger.kernel.org
Subject: [RFC PATCH 03/22] thunderbolt: Log warning if adding switch fails
Date:   Tue,  1 Oct 2019 14:38:11 +0300
Message-Id: <20191001113830.13028-4-mika.westerberg@linux.intel.com>
In-Reply-To: <20191001113830.13028-1-mika.westerberg@linux.intel.com>
References: <20191001113830.13028-1-mika.westerberg@linux.intel.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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@linux.intel.com>
---
 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