If the USB3 link is not up the actual link rate is 0 so when reclaiming
bandwidth we should look at maximum supported link rate instead.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 0bd680cd900c ("thunderbolt: Add USB3 bandwidth management")
Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
---
drivers/thunderbolt/tunnel.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c
index 2aae2c76d880..d50e5b93632a 100644
--- a/drivers/thunderbolt/tunnel.c
+++ b/drivers/thunderbolt/tunnel.c
@@ -951,10 +951,18 @@ static void tb_usb3_reclaim_available_bandwidth(struct tb_tunnel *tunnel,
int ret, max_rate, allocate_up, allocate_down;
ret = usb4_usb3_port_actual_link_rate(tunnel->src_port);
- if (ret <= 0) {
- tb_tunnel_warn(tunnel, "tunnel is not up\n");
+ if (ret < 0) {
+ tb_tunnel_warn(tunnel, "failed to read actual link rate\n");
return;
+ } else if (!ret) {
+ /* Use maximum link rate if the link valid is not set */
+ ret = usb4_usb3_port_max_link_rate(tunnel->src_port);
+ if (ret < 0) {
+ tb_tunnel_warn(tunnel, "failed to read maximum link rate\n");
+ return;
+ }
}
+
/*
* 90% of the max rate can be allocated for isochronous
* transfers.
--
2.28.0
