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Commit 53152ba8 authored by Shivakumar Malke's avatar Shivakumar Malke
Browse files

msm: camera: ope: Avoid deadlock in OPE PF handling 



In OPE fault handler, while dumping pf info ctx_mutex is
acquired and corresponding page fault ops is called. In
pagefault ops same mutex is getting acquired again causing
a dead lock.

This commit avoids locking the same mutex again.

CRs-Fixed: 3419490
Change-Id: I2e37f725865d091f2cb682fc62f5d21278b93959
Signed-off-by: default avatarShivakumar Malke <quic_smalke@quicinc.com>
parent 687f2e3e

drivers/cam_ope/cam_ope_context.c

+1 −2
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (c) 2019-2021, The Linux Foundation. All rights reserved.

 * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.

 */



#include <linux/debugfs.h>
@@ -39,7 +40,6 @@ static int cam_ope_context_dump_active_request(void *data, 
		return -EINVAL;

	}



	mutex_lock(&ctx->ctx_mutex);

	if (ctx->state < CAM_CTX_ACQUIRED || ctx->state > CAM_CTX_ACTIVATED) {

		CAM_ERR(CAM_OPE, "Invalid state ope ctx %d state %d",

			ctx->ctx_id, ctx->state);
@@ -65,7 +65,6 @@ static int cam_ope_context_dump_active_request(void *data, 
	}



end:

	mutex_unlock(&ctx->ctx_mutex);

	return rc;

}