!1283 media: dm1105: Fix use after free bug in dm1105_remove due to race condition

Merge Pull Request from: @ci-robot 
 
PR sync from: Pu Lehui <pulehui@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/I6FYDSV7M256UEC5NL26CH6SJ3NLHPXX/ 
 
 
Link:https://gitee.com/openeuler/kernel/pulls/1283 

Reviewed-by: Xu Kuohai <xukuohai@huawei.com> 
Reviewed-by: Jialin Zhang <zhangjialin11@huawei.com> 
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com> 

drivers/media/pci/dm1105/dm1105.c

@@ -1178,6 +1178,7 @@ static void dm1105_remove(struct pci_dev *pdev)
 	struct dvb_demux *dvbdemux = &dev->demux;
 	struct dmx_demux *dmx = &dvbdemux->dmx;
 
+	cancel_work_sync(&dev->ir.work);
 	dm1105_ir_exit(dev);
 	dmx->close(dmx);
 	dvb_net_release(&dev->dvbnet);