diff options
Diffstat (limited to 'drivers/thunderbolt')
| -rw-r--r-- | drivers/thunderbolt/switch.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c index 99effd6be3c1..7ffb3b00b54f 100644 --- a/drivers/thunderbolt/switch.c +++ b/drivers/thunderbolt/switch.c @@ -601,6 +601,13 @@ int tb_port_add_nfc_credits(struct tb_port *port, int credits) if (credits == 0 || port->sw->is_unplugged) return 0; + /* + * USB4 restricts programming NFC buffers to lane adapters only + * so skip other ports. + */ + if (tb_switch_is_usb4(port->sw) && !tb_port_is_null(port)) + return 0; + nfc_credits = port->config.nfc_credits & ADP_CS_4_NFC_BUFFERS_MASK; nfc_credits += credits; |