usb: typec: ucsi: Fix reuse of completion structure

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>

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index f0c2fa1..576cb0e 100644 (file)
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -949,6 +949,8 @@ static int ucsi_dr_swap(struct typec_port *port, enum typec_data_role role)
             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;
@@ -985,6 +987,8 @@ static int ucsi_pr_swap(struct typec_port *port, enum typec_role role)
        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;