CCS/AM5728: PRU program reload issue

Part Number: AM5728

Tool/software: Code Composer Studio

linux version : 4.9.69-ti-rt-r85

Here is the software logic , at the beginning I create rpmsg channel .

	int ret=-1;
	Rtrunner runner;
	//Tag init(), Here I create the rpmsg-pru channel
	ret = runner.init();
	if(ret != 0)
	{

		return ret;
	}
	ret = runner.shakehands();
	if(ret != 0)
	{

		return ret;
	}
	do
	{
		ret = runner.run();
	}while(ret==0);

	return ret;

I used "echo $PASS_WRD|sudo -S bash -c "echo stop > /sys/class/remoteproc/remoteproc4/state" to start PRU , from the syslog we can see that , 

virtio_rpmsg_bus virtio0: creating channel rpmsg-pru addr 0x1e

But after 30 mins , I double check the syslog , and found that rpmsg channel is being created again,  so I assume that PRU program reload itself.

Below is the syslog. 

.....

Nov 21 10:07:48 arm sh[565]: g_multi: waiting for /sys/class/net/usb1/
Nov 21 10:07:49 arm kernel: [171709.651591] virtio_rpmsg_bus virtio0: creating channel rpmsg-pru addr 0x1e
Nov 21 10:07:49 arm kernel: [171709.651617] virtio_rpmsg_bus virtio0: channel rpmsg-pru:Channel 30:ffffffff:1e already exist
Nov 21 10:07:49 arm kernel: [171709.660186] virtio_rpmsg_bus virtio0: rpmsg_create_channel failed
Nov 21 10:07:49 arm kernel: [171709.774552] rpmsg_pru rpmsg_pru30: Device already open