USB PD: Don't attempt to exit mode on a suspended port

Since suspended ports run a very tight while loop which does not include
the pd_task's event processing, sysjumping an unlocked system with
a suspended port hangs forever.

A suspended port cannot be in an alternate mode, so this change skips
setting PD_EVENT_SYSJUMP for such ports (which, currently, is only used
to trigger the exit mode sequence).  In the unlikely event that
processing a PD interrupt causes the port to suspend after this check
and before PD_EVENT_SYSJUMP is set, the sysjump loop will also send the
reply event to the caller.

BUG=b:131855159
BRANCH=None
TEST=set a phaser port to fail TCPC initialization, verified that
"sysjump RW" can still succeed with suspended port

Change-Id: I948dd419718d0eb2e5ade58970ed36a8bd51b272
Signed-off-by: Diana Z <dzigterman@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1613640
Reviewed-by: Jett Rink <jettrink@chromium.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>

0 files changed, 0 insertions, 0 deletions