[PATCH 4/4] thunderbolt: Fix port linking by checking all adapters

Sanjay R Mehta
2021-08-02T12:59:00Z

From: Sanjay R Mehta <sanju.mehta@amd.com>

In tb_switch_default_link_ports(), while linking of ports,
only odd-numbered ports (1,3,5..) are considered and even-numbered
ports are not considered.

AMD host router has lane adapters at 2 & 3 and link ports at
adapter-2 is not considered due to which lane bonding gets disabled.

Hence added a fix such that all ports are considered during
linking of ports.

Fixes: 0d46c08d1ed4 ("thunderbolt: Add default linking between lane adapters if not provided by DROM")
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
---
drivers/thunderbolt/switch.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index effbfe4..8b2fe67 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -2456,7 +2456,7 @@ static void tb_switch_default_link_ports(struct tb_switch *sw)
{
int i;

- for (i = 1; i <= sw->config.max_port_number; i += 2) {
+ for (i = 1; i <= sw->config.max_port_number; i++) {
struct tb_port *port = &sw->ports[i];
struct tb_port *subordinate;

--
2.7.4