usb: typec: tcpm: Skip hard reset when in error recovery

commit a6fe37f428c19dd164c2111157d4a1029bd853aa upstream.

Hard reset queued prior to error recovery (or) received during
error recovery will make TCPM to prematurely exit error recovery
sequence. Ignore hard resets received during error recovery (or)
port reset sequence.

```
[46505.459688] state change SNK_READY -> ERROR_RECOVERY [rev3 NONE_AMS]
[46505.459706] state change ERROR_RECOVERY -> PORT_RESET [rev3 NONE_AMS]
[46505.460433] disable vbus discharge ret:0
[46505.461226] Setting usb_comm capable false
[46505.467244] Setting voltage/current limit 0 mV 0 mA
[46505.467262] polarity 0
[46505.470695] Requesting mux state 0, usb-role 0, orientation 0
[46505.475621] cc:=0
[46505.476012] pending state change PORT_RESET -> PORT_RESET_WAIT_OFF @ 100 ms [rev3 NONE_AMS]
[46505.476020] Received hard reset
[46505.476024] state change PORT_RESET -> HARD_RESET_START [rev3 HARD_RESET]
```

Cc: stable@vger.kernel.org
Fixes: f0690a25a140 ("staging: typec: USB Type-C Port Manager (tcpm)")
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Acked-by: Heikki Krogeus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231101021909.2962679-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 5e9d0c6..bf615dc 100644 (file)
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -5426,6 +5426,15 @@ static void _tcpm_pd_hard_reset(struct tcpm_port *port)
        if (port->bist_request == BDO_MODE_TESTDATA && port->tcpc->set_bist_data)
                port->tcpc->set_bist_data(port->tcpc, false);
 
+       switch (port->state) {
+       case ERROR_RECOVERY:
+       case PORT_RESET:
+       case PORT_RESET_WAIT_OFF:
+               return;
+       default:
+               break;
+       }
+
        if (port->ams != NONE_AMS)
                port->ams = NONE_AMS;
        if (port->hard_reset_count < PD_N_HARD_RESET_COUNT)