diff mbox series

[v3,1/6] thunderbolt: Silently ignore CLx enabling in case CLx is not supported

Message ID 20220511140549.10571-2-gil.fine@intel.com
State Superseded
Headers show
Series thunderbolt: CL1 support for USB4 and Titan Ridge | expand

Commit Message

Gil Fine May 11, 2022, 2:05 p.m. UTC 
We can't enable CLx if it is not supported either by the host or device,
or by the USB4/TBT link (e.g. when an optical cable is used).
We silently ignore CLx enabling in this case.

Signed-off-by: Gil Fine <gil.fine@intel.com>
---
 drivers/thunderbolt/tb.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/thunderbolt/tb.c b/drivers/thunderbolt/tb.c
index 44d04b651a8b..7419cd1aefba 100644
--- a/drivers/thunderbolt/tb.c
+++ b/drivers/thunderbolt/tb.c
@@ -581,6 +581,7 @@  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;
@@ -669,7 +670,9 @@  static void tb_scan_port(struct tb_port *port)
 	tb_switch_lane_bonding_enable(sw);
 	/* Set the link configured */
 	tb_switch_configure_link(sw);
-	if (tb_switch_enable_clx(sw, TB_CL0S))
+	/* Silently ignore CLx enabling in case CLx is not supported */
+	ret = tb_switch_enable_clx(sw, TB_CL0S);
+	if (ret && ret != -EOPNOTSUPP)
 		tb_sw_warn(sw, "failed to enable CLx on upstream port\n");
 
 	tb_switch_tmu_configure(sw, TB_SWITCH_TMU_RATE_HIFI,
@@ -1452,12 +1455,15 @@  static int tb_suspend_noirq(struct tb *tb)
 static void tb_restore_children(struct tb_switch *sw)
 {
 	struct tb_port *port;
+	int ret;
 
 	/* No need to restore if the router is already unplugged */
 	if (sw->is_unplugged)
 		return;
 
-	if (tb_switch_enable_clx(sw, TB_CL0S))
+	/* Silently ignore CLx re-enabling in case CLx is not supported */
+	ret = tb_switch_enable_clx(sw, TB_CL0S);
+	if (ret && ret != -EOPNOTSUPP)
 		tb_sw_warn(sw, "failed to re-enable CLx on upstream port\n");
 
 	/*