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Commit f921315e authored by Maulik Shah's avatar Maulik Shah Committed by Gerrit - the friendly Code Review server
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soc: qcom: rpm-smd: wait till all active set acks are cleared 



Wait till all pending acks are receivied for active set messages
before lpm driver choose to enter rpm assisted pc.

Change-Id: Ifefb9f3ae88d890e64e7e123e0fcedc00aea719c
Signed-off-by: default avatarMaulik Shah <mkshah@codeaurora.org>
parent f2304aea

drivers/soc/qcom/rpm-smd.c

+4 −29
Original line number Diff line number Diff line
@@ -523,7 +523,6 @@ static int msm_rpm_read_sleep_ack(void) 
{

	int ret;

	char buf[MAX_ERR_BUFFER_SIZE] = {0};

	uint32_t msg_id;



	if (glink_enabled)

		ret = msm_rpm_glink_rx_poll(glink_data->glink_handle);
@@ -554,38 +553,18 @@ static int msm_rpm_read_sleep_ack(void) 
			return -EAGAIN;



		ret = msm_rpm_read_smd_data(buf);

		if (!ret) {

			/* Mimic Glink behavior to ensure that the

			 * data is read and the msg is removed from

			 * the wait list. We should have gotten here

			 * only when there are no drivers waiting on

			 * ACKs. msm_rpm_get_entry_from_msg_id()

			 * return non-NULL only then.

			 */

			msg_id = msm_rpm_get_msg_id_from_ack(buf);

			msm_rpm_process_ack(msg_id, 0);

		if (!ret)

			ret = smd_is_pkt_avail(msm_rpm_data.ch_info);

	}

	}

	return ret;

}



static void msm_rpm_flush_noack_messages(void)

{

	while (!list_empty(&msm_rpm_wait_list)) {

		if (!msm_rpm_read_sleep_ack())

			break;

	}

}



static int msm_rpm_flush_requests(bool print)

{

	struct rb_node *t;

	int ret;

	int count = 0;



	msm_rpm_flush_noack_messages();



	for (t = rb_first(&tr_root); t; t = rb_next(t)) {



		struct slp_buf *s = rb_entry(t, struct slp_buf, node);
@@ -844,18 +823,14 @@ static void msm_rpm_notify(void *data, unsigned event) 


bool msm_rpm_waiting_for_ack(void)

{

	bool ret = false;

	bool ret;

	unsigned long flags;

	struct msm_rpm_wait_data *elem = NULL;



	spin_lock_irqsave(&msm_rpm_list_lock, flags);

	elem = list_first_entry_or_null(&msm_rpm_wait_list,

				struct msm_rpm_wait_data, list);

	if (elem)

		ret = !elem->delete_on_ack;

	ret = list_empty(&msm_rpm_wait_list);

	spin_unlock_irqrestore(&msm_rpm_list_lock, flags);



	return ret;

	return !ret;

}



static struct msm_rpm_wait_data *msm_rpm_get_entry_from_msg_id(uint32_t msg_id)