diff mbox series

[5.12,112/173] usb: typec: tcpm: Do not finish VDM AMS for retrying Responses

Message ID 20210614102701.891223351@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman June 14, 2021, 10:27 a.m. UTC 
From: Kyle Tso <kyletso@google.com>

commit 5ab14ab1f2db24ffae6c5c39a689660486962e6e upstream.

If the VDM responses couldn't be sent successfully, it doesn't need to
finish the AMS until the retry count reaches the limit.

Fixes: 0908c5aca31e ("usb: typec: tcpm: AMS and Collision Avoidance")
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable <stable@vger.kernel.org>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Kyle Tso <kyletso@google.com>
Link: https://lore.kernel.org/r/20210606081452.764032-1-kyletso@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/tcpm/tcpm.c |    3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -1917,6 +1917,9 @@  static void vdm_run_state_machine(struct
 			tcpm_log(port, "VDM Tx error, retry");
 			port->vdm_retries++;
 			port->vdm_state = VDM_STATE_READY;
+			if (PD_VDO_SVDM(vdo_hdr) && PD_VDO_CMDT(vdo_hdr) == CMDT_INIT)
+				tcpm_ams_finish(port);
+		} else {
 			tcpm_ams_finish(port);
 		}
 		break;