msm: camera: isp: Add handling for flush in flushed state

This change handles race condition in which flush is handled in
flushed state.

CRs-Fixed: 3038297
Change-Id: I8be1f8c70431c77366f8846d8ccab3414f3ede3e
Signed-off-by: Vikram Sharma <[email protected]>

drivers/cam_isp/cam_isp_context.c

@@ -4068,6 +4068,18 @@ hw_dump:
 	return rc;
 }
 
+static int __cam_isp_ctx_flush_req_in_flushed_state(
+	struct cam_context               *ctx,
+	struct cam_req_mgr_flush_request *flush_req)
+{
+	CAM_INFO(CAM_ISP, "Flush (type %d) in flushed state req id %lld ctx_id:%d",
+		flush_req->type, flush_req->req_id, ctx->ctx_id);
+	if (flush_req->req_id > ctx->last_flush_req)
+		ctx->last_flush_req = flush_req->req_id;
+
+	return 0;
+}
+
 static int __cam_isp_ctx_flush_req(struct cam_context *ctx,
 	struct list_head *req_list, struct cam_req_mgr_flush_request *flush_req)
 {
@@ -5171,6 +5183,14 @@ static int __cam_isp_ctx_config_dev_in_top_state(
 			packet->header.request_id);
 		rc = -EBADR;
 		goto free_req;
+	} else if ((packet_opcode == CAM_ISP_PACKET_INIT_DEV)
+		&& (packet->header.request_id <= ctx->last_flush_req)
+		&& ctx->last_flush_req && packet->header.request_id) {
+		CAM_WARN(CAM_ISP,
+			"last flushed req is %lld, config dev(init) for req %lld",
+			ctx->last_flush_req, packet->header.request_id);
+		rc = -EBADR;
+		goto free_req;
 	}
 
 	cfg.packet = packet;
@@ -6809,6 +6829,7 @@ static struct cam_ctx_ops
 		.crm_ops = {
 			.unlink = __cam_isp_ctx_unlink_in_ready,
 			.process_evt = __cam_isp_ctx_process_evt,
+			.flush_req = __cam_isp_ctx_flush_req_in_flushed_state,
 		},
 		.irq_ops = NULL,
 		.pagefault_ops = cam_isp_context_dump_requests,