After soft reset has completed, an Explicit Contract negotiation occurs.
The sink device will receive source capabilitys again. This will cause
a duplicate source-capabilities file be created.
And the kernel will dump:
sysfs: cannot create duplicate filename '/devices/virtual/usb_power_delivery/pd1/source-capabilities'
This will unregister existing capabilities when received soft reset or is
sending soft reset by sink.
Fixes: 8203d26905ee ("usb: typec: tcpm: Register USB Power Delivery Capabilities")
cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx>
---
drivers/usb/typec/tcpm/tcpm.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index a0d943d78580..d84649838082 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -4570,6 +4570,8 @@ static void run_state_machine(struct tcpm_port *port)
case SOFT_RESET:
port->message_id = 0;
port->rx_msgid = -1;
+ /* remove existing capabilities */
+ usb_power_delivery_unregister_capabilities(port->partner_source_caps);
tcpm_pd_send_control(port, PD_CTRL_ACCEPT);
tcpm_ams_finish(port);
if (port->pwr_role == TYPEC_SOURCE) {
@@ -4589,6 +4591,8 @@ static void run_state_machine(struct tcpm_port *port)
case SOFT_RESET_SEND:
port->message_id = 0;
port->rx_msgid = -1;
+ /* remove existing capabilities */
+ usb_power_delivery_unregister_capabilities(port->partner_source_caps);
if (tcpm_pd_send_control(port, PD_CTRL_SOFT_RESET))
tcpm_set_state_cond(port, hard_reset_state(port), 0);
else
--
2.34.1
