[PATCH 5.13 098/175] usb: typec: tcpm: Keep other events when receiving FRS and Sourcing_vbus events

From: Greg Kroah-Hartman
Date: Tue Aug 10 2021 - 14:03:04 EST


From: Kyle Tso <kyletso@xxxxxxxxxx>

commit 43ad944cd73f2360ec8ff31d29ea44830b3119af upstream.

When receiving FRS and Sourcing_Vbus events from low-level drivers, keep
other events which come a bit earlier so that they will not be ignored
in the event handler.

Fixes: 8dc4bd073663 ("usb: typec: tcpm: Add support for Sink Fast Role SWAP(FRS)")
Cc: stable <stable@xxxxxxxxxxxxxxx>
Cc: Badhri Jagan Sridharan <badhri@xxxxxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Reviewed-by: Badhri Jagan Sridharan <badhri@xxxxxxxxxx>
Signed-off-by: Kyle Tso <kyletso@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210803091314.3051302-1-kyletso@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/typec/tcpm/tcpm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -5355,7 +5355,7 @@ EXPORT_SYMBOL_GPL(tcpm_pd_hard_reset);
void tcpm_sink_frs(struct tcpm_port *port)
{
spin_lock(&port->pd_event_lock);
- port->pd_events = TCPM_FRS_EVENT;
+ port->pd_events |= TCPM_FRS_EVENT;
spin_unlock(&port->pd_event_lock);
kthread_queue_work(port->wq, &port->event_work);
}
@@ -5364,7 +5364,7 @@ EXPORT_SYMBOL_GPL(tcpm_sink_frs);
void tcpm_sourcing_vbus(struct tcpm_port *port)
{
spin_lock(&port->pd_event_lock);
- port->pd_events = TCPM_SOURCING_VBUS;
+ port->pd_events |= TCPM_SOURCING_VBUS;
spin_unlock(&port->pd_event_lock);
kthread_queue_work(port->wq, &port->event_work);
}