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Commit 6ae7336a authored by Chris Lew's avatar Chris Lew
Browse files

mailbox: msm_qmp: Wait for link up in mbox_startup 



There is a chance a client probe can start before the link is
established with the remote processor. Add a wait for link up in the
mailbox startup to prevent extra probe deferrrals for clients.

Change-Id: Idd53349cd91e810126be62bcf27adc53a98417ec
Signed-off-by: default avatarChris Lew <clew@codeaurora.org>
parent edcd9db1

drivers/mailbox/msm_qmp.c

+5 −5
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.

 * Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.

 */



#include <linux/io.h>
@@ -337,12 +337,12 @@ static int qmp_startup(struct mbox_chan *chan) 
	if (!mbox)

		return -EINVAL;



	mutex_lock(&mbox->state_lock);

	if (!completion_done(&mbox->link_complete)) {

		mutex_unlock(&mbox->state_lock);

	ret = wait_for_completion_timeout(&mbox->link_complete,

					  msecs_to_jiffies(QMP_TOUT_MS));

	if (!ret)

		return -EAGAIN;

	}



	mutex_lock(&mbox->state_lock);

	if (mbox->local_state == LINK_CONNECTED) {

		set_mcore_ch(mbox, QMP_MBOX_CH_CONNECTED);

		mbox->local_state = LOCAL_CONNECTING;