msm: camera: ope: Handle race while dumping ope req list

While dumping OPE req list we were not protecting it in context mutex,
this can result into unexpected behaviors. This change take care of
protecting the dump logic using mutex.

CRs-Fixed: 2750458
Change-Id: I916822b498cde3922274c18a06b98c898bff1d65
Signed-off-by: Vikram Sharma <[email protected]>

drivers/cam_ope/ope_hw_mgr/cam_ope_hw_mgr.c

@@ -43,6 +43,8 @@
 
 static struct cam_ope_hw_mgr *ope_hw_mgr;
 
+static int cam_ope_req_timer_reset(struct cam_ope_ctx *ctx_data);
+
 static int cam_ope_mgr_get_rsc_idx(struct cam_ope_ctx *ctx_data,
 	struct ope_io_buf_info *in_io_buf)
 {
@@ -125,6 +127,8 @@ static int cam_ope_mgr_process_cmd(void *priv, void *data)
 	if (task_data->req_id > ctx_data->last_flush_req)
 		ctx_data->last_flush_req = 0;
 
+	cam_ope_req_timer_reset(ctx_data);
+
 	rc = cam_cdm_submit_bls(ctx_data->ope_cdm.cdm_handle, cdm_cmd);
 
 	if (!rc)
@@ -3639,6 +3643,7 @@ static int cam_ope_mgr_hw_dump(void *hw_priv, void *hw_dump_args)
 	}
 
 	mutex_lock(&hw_mgr->hw_mgr_mutex);
+	mutex_lock(&ctx_data->ctx_mutex);
 
 	CAM_INFO(CAM_OPE, "Req %lld", dump_args->request_id);
 	for (idx = 0; idx < CAM_CTX_REQ_MAX; idx++) {
@@ -3652,6 +3657,7 @@ static int cam_ope_mgr_hw_dump(void *hw_priv, void *hw_dump_args)
 
 	/* no matching request found */
 	if (idx == CAM_CTX_REQ_MAX) {
+		mutex_unlock(&ctx_data->ctx_mutex);
 		mutex_unlock(&hw_mgr->hw_mgr_mutex);
 		return 0;
 	}
@@ -3669,6 +3675,7 @@ static int cam_ope_mgr_hw_dump(void *hw_priv, void *hw_dump_args)
 			req_ts.tv_nsec/NSEC_PER_USEC,
 			cur_ts.tv_sec,
 			cur_ts.tv_nsec/NSEC_PER_USEC);
+		mutex_unlock(&ctx_data->ctx_mutex);
 		mutex_unlock(&hw_mgr->hw_mgr_mutex);
 		return 0;
 	}
@@ -3680,6 +3687,7 @@ static int cam_ope_mgr_hw_dump(void *hw_priv, void *hw_dump_args)
 		cur_ts.tv_sec,
 		cur_ts.tv_nsec/NSEC_PER_USEC);
 
+	mutex_unlock(&ctx_data->ctx_mutex);
 	mutex_unlock(&hw_mgr->hw_mgr_mutex);
 	return 0;
 }