diff options
Diffstat (limited to 'drivers/thunderbolt/switch.c')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index a0451218af2a..ebe9559c8c79 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -2430,9 +2430,13 @@ int tb_switch_configure(struct tb_switch *sw) /* * For USB4 devices, we need to program the CM version * accordingly so that it knows to expose all the - * additional capabilities. + * additional capabilities. Program it according to USB4 + * version to avoid changing existing (v1) routers behaviour. */ - sw->config.cmuv = USB4_VERSION_1_0; + if (usb4_switch_version(sw) < 2) + sw->config.cmuv = ROUTER_CS_4_CMUV_V1; + else + sw->config.cmuv = ROUTER_CS_4_CMUV_V2; sw->config.plug_events_delay = 0xa; /* Enumerate the switch */ |