usb: typec: tcpm: skip checking port->send_discover in PD3.0

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The original Collison Avoidance mechanism, port->send_discover, avoids
the conflict when port partners start AMS almost the same time. However,
this mechanism is replaced by SINK_TX_OK and SINK_TX_NG. Skip the check
in PD3.0 to avoid the deadlock when source is requesting DR_SWAP where
sink is requesting DISCOVER_IDENTITY.

Signed-off-by: Guan-Yu Lin <guanyulin@google.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20231116083221.1201892-1-guanyulin@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Guan-Yu Lin 2023-11-16 16:32:16 +08:00 • committed by Greg Kroah-Hartman

parent 9768af12ed

commit e0cc05d52a

1 changed files with 3 additions and 3 deletions

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drivers/usb/typec/tcpm/tcpm.c

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