[PATCH 5.10 018/129] usb: typec: ucsi: Fix reuse of completion structure

[Greg Kroah-Hartman]

From: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>

commit e25adcca917d7e4cdc1dc6444d0692ffda7594bf upstream.

The role swapping completion variable is reused, so it needs
to be reinitialised every time. Otherwise it will be marked
as done after the first time it's used and completing
immediately.

Link: https://lore.kernel.org/linux-usb/20220325203959.GA19752@xxxxxxxxxxxxxxxxxxxxxxxx/
Fixes: 6df475f804e6 ("usb: typec: ucsi: Start using struct typec_operations")
Cc: stable@xxxxxxxxxxxxxxx
Reported-and-suggested-by: Jack Pham <quic_jackp@xxxxxxxxxxx>
Signed-off-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220405134824.68067-2-heikki.krogerus@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/typec/ucsi/ucsi.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -928,6 +928,8 @@ static int ucsi_dr_swap(struct typec_por
 	     role == TYPEC_HOST))
 		goto out_unlock;
 
+	reinit_completion(&con->complete);
+
 	command = UCSI_SET_UOR | UCSI_CONNECTOR_NUMBER(con->num);
 	command |= UCSI_SET_UOR_ROLE(role);
 	command |= UCSI_SET_UOR_ACCEPT_ROLE_SWAPS;
@@ -964,6 +966,8 @@ static int ucsi_pr_swap(struct typec_por
 	if (cur_role == role)
 		goto out_unlock;
 
+	reinit_completion(&con->complete);
+
 	command = UCSI_SET_PDR | UCSI_CONNECTOR_NUMBER(con->num);
 	command |= UCSI_SET_PDR_ROLE(role);
 	command |= UCSI_SET_PDR_ACCEPT_ROLE_SWAPS;