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Commit af374fc4 authored by Ayush Kumar's avatar Ayush Kumar
Browse files

msm: camera: sync: Prevent spin lock recursion 



This commit handle spin lock recursion when both the
parent sync object is same as one of its child object.

CRs-Fixed: 2629192
Change-Id: I524f8ff176250d6aa32b1a03797cfa7858147c51
Signed-off-by: default avatarAyush Kumar <ayushkr@codeaurora.org>
parent e824a782

drivers/cam_sync/cam_sync_util.c

+7 −1
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) 2017-2020, The Linux Foundation. All rights reserved.

 */



#include "cam_sync_util.h"
@@ -72,6 +72,12 @@ int cam_sync_init_group_object(struct sync_table_row *table, 
	 * If any child state is ERROR or SUCCESS, it will not be added to list.

	 */

	for (i = 0; i < num_objs; i++) {

		if (idx == sync_objs[i]) {

			CAM_ERR(CAM_SYNC,

				"Invalid, same as parent fence : %i", idx);

			rc = -EINVAL;

			goto clean_children_info;

		}

		child_row = table + sync_objs[i];

		spin_lock_bh(&sync_dev->row_spinlocks[sync_objs[i]]);