[PATCH 1/5] thunderbolt: Fix lane bonding log message when bonding not possible

[Gil Fine <gil.fine@linux.intel.com>]

Currently, if lane bonding is not possible or not supported, we continue
and read the updated number of Total Buffers from lane adapters without need,
and incorrectly log the bonding flow as succeeded even if it didn't.

Fix lane bonding log message when bonding not possible and bail out early.

Signed-off-by: Gil Fine <gil.fine@linux.intel.com>
---
 drivers/thunderbolt/switch.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index dda30e1d75e9..e7faa203b782 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -2953,14 +2953,14 @@ static int tb_switch_lane_bonding_enable(struct tb_switch *sw)
 	int ret;
 
 	if (!tb_switch_lane_bonding_possible(sw))
-		return 0;
+		return -EOPNOTSUPP;
 
 	up = tb_upstream_port(sw);
 	down = tb_switch_downstream_port(sw);
 
 	if (!tb_port_width_supported(up, TB_LINK_WIDTH_DUAL) ||
 	    !tb_port_width_supported(down, TB_LINK_WIDTH_DUAL))
-		return 0;
+		return -EOPNOTSUPP;
 
 	/*
 	 * Both lanes need to be in CL0. Here we assume lane 0 already be in
-- 
2.43.0