Commit 564b4172 authored May 24, 2017 by Jack Pham

usb: pd: Rerun usbpd_sm if RX queue is not empty



Upon receiving a PD message the state machine is queued to
act on it. However, if another message is received quickly
before usbpd_sm is scheduled, it will only process the first
message. Add a check if the RX queue is not empty in order
to drain the messages properly.

Change-Id: Ie9e079a51a5740024c9a1be5ba27b3edacf9b2df
Signed-off-by: Jack Pham <jackp@codeaurora.org>

parent 684a7b03

drivers/usb/pd/policy_engine.c

+8 −0

Original line number	Original line	Diff line number	Diff line
	@@ -2313,6 +2313,14 @@ static void usbpd_sm(struct work_struct *w)
	sm_done:		sm_done:
	kfree(rx_msg);		kfree(rx_msg);

			spin_lock_irqsave(&pd->rx_lock, flags);
			ret = list_empty(&pd->rx_q);
			spin_unlock_irqrestore(&pd->rx_lock, flags);

			/* requeue if there are any new/pending RX messages */
			if (!ret)
			kick_sm(pd, 0);

	if (!pd->sm_queued)		if (!pd->sm_queued)
	pm_relax(&pd->dev);		pm_relax(&pd->dev);
	}		}