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usb: typec: tcpm: clear pd_event queue in PORT_RESET
commitbf20c69cf3
upstream. When a Fast Role Swap control message attempt results in a transition to ERROR_RECOVERY, the TCPC can still queue a TCPM_SOURCING_VBUS event. If the event is queued but processed after the tcpm_reset_port() call in the PORT_RESET state, then the following occurs: 1. tcpm_reset_port() calls tcpm_init_vbus() to reset the vbus sourcing and sinking state 2. tcpm_pd_event_handler() turns VBUS on before the port is in the default state. 3. The port resolves as a sink. In the SNK_DISCOVERY state, tcpm_set_charge() cannot set vbus to charge. Clear pd events within PORT_RESET to get rid of non-applicable events. Fixes:b17dd57118
("staging: typec: tcpm: Improve role swap with non PD capable partners") Cc: stable@vger.kernel.org Signed-off-by: RD Babiera <rdbabiera@google.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Link: https://lore.kernel.org/r/20240423202715.3375827-2-rdbabiera@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -4859,6 +4859,7 @@ static void run_state_machine(struct tcpm_port *port)
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break;
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case PORT_RESET:
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tcpm_reset_port(port);
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port->pd_events = 0;
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if (port->self_powered)
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tcpm_set_cc(port, TYPEC_CC_OPEN);
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else
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