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

Greg Kroah-Hartman
2022-05-04T16:59:37Z

From: Heikki Krogerus <heikki.krogerus@linux.intel.com>

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@jackp-linux.qualcomm.com/
Fixes: 6df475f804e6 ("usb: typec: ucsi: Start using struct typec_operations")
Cc: stable@vger.kernel.org
Reported-and-suggested-by: Jack Pham <quic_jackp@quicinc.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20220405134824.68067-2-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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;