diff options
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/path.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/thunderbolt/path.c b/drivers/thunderbolt/path.c index 03e7b714deab..7c2c45d9ba4a 100644 --- a/drivers/thunderbolt/path.c +++ b/drivers/thunderbolt/path.c @@ -406,10 +406,17 @@ static int __tb_path_deactivate_hop(struct tb_port *port, int hop_index, if (!hop.pending) { if (clear_fc) { - /* Clear flow control */ - hop.ingress_fc = 0; + /* + * Clear flow control. Protocol adapters + * IFC and ISE bits are vendor defined + * in the USB4 spec so we clear them + * only for pre-USB4 adapters. + */ + if (!tb_switch_is_usb4(port->sw)) { + hop.ingress_fc = 0; + hop.ingress_shared_buffer = 0; + } hop.egress_fc = 0; - hop.ingress_shared_buffer = 0; hop.egress_shared_buffer = 0; return tb_port_write(port, &hop, TB_CFG_HOPS, |