[PATCH 5.15 075/356] usb: typec: tcpm: Ignore received Hard Reset in TOGGLING state

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Kyle Tso <kyletso@xxxxxxxxxx>

commit fc8fb9eea94d8f476e15f3a4a7addeb16b3b99d6 upstream.

Similar to what fixed in Commit a6fe37f428c1 ("usb: typec: tcpm: Skip
hard reset when in error recovery"), the handling of the received Hard
Reset has to be skipped during TOGGLING state.

[ 4086.021288] VBUS off
[ 4086.021295] pending state change SNK_READY -> SNK_UNATTACHED @ 650 ms [rev2 NONE_AMS]
[ 4086.022113] VBUS VSAFE0V
[ 4086.022117] state change SNK_READY -> SNK_UNATTACHED [rev2 NONE_AMS]
[ 4086.022447] VBUS off
[ 4086.022450] state change SNK_UNATTACHED -> SNK_UNATTACHED [rev2 NONE_AMS]
[ 4086.023060] VBUS VSAFE0V
[ 4086.023064] state change SNK_UNATTACHED -> SNK_UNATTACHED [rev2 NONE_AMS]
[ 4086.023070] disable BIST MODE TESTDATA
[ 4086.023766] disable vbus discharge ret:0
[ 4086.023911] Setting usb_comm capable false
[ 4086.028874] Setting voltage/current limit 0 mV 0 mA
[ 4086.028888] polarity 0
[ 4086.030305] Requesting mux state 0, usb-role 0, orientation 0
[ 4086.033539] Start toggling
[ 4086.038496] state change SNK_UNATTACHED -> TOGGLING [rev2 NONE_AMS]

// This Hard Reset is unexpected
[ 4086.038499] Received hard reset
[ 4086.038501] state change TOGGLING -> HARD_RESET_START [rev2 HARD_RESET]

Fixes: f0690a25a140 ("staging: typec: USB Type-C Port Manager (tcpm)")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Kyle Tso <kyletso@xxxxxxxxxx>
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240520154858.1072347-1-kyletso@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/typec/tcpm/tcpm.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -5351,6 +5351,7 @@ static void _tcpm_pd_hard_reset(struct t
 		port->tcpc->set_bist_data(port->tcpc, false);
 
 	switch (port->state) {
+	case TOGGLING:
 	case ERROR_RECOVERY:
 	case PORT_RESET:
 	case PORT_RESET_WAIT_OFF:






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