1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c
index 7b8c9d3b6efc..c69df7ebb6a7 100644
--- a/drivers/media/video/cx88/cx88-dvb.c
+++ b/drivers/media/video/cx88/cx88-dvb.c
@@ -133,6 +133,7 @@ static int cx88_dvb_bus_ctrl(struct dvb_frontend* fe, int acquire)
                 return -EINVAL;
         }
 
+        mutex_lock(&dev->core->lock);
         drv = cx8802_get_driver(dev, CX88_MPEG_DVB);
         if (drv) {
                 if (acquire){
@@ -143,6 +144,7 @@ static int cx88_dvb_bus_ctrl(struct dvb_frontend* fe, int acquire)
                         dev->frontends.active_fe_id = 0;
                 }
         }
+        mutex_unlock(&dev->core->lock);
 
         return ret;
 }