1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c
index 0960d7f0d394..08c10240e70f 100644
--- a/drivers/media/video/vivi.c
+++ b/drivers/media/video/vivi.c
@@ -1149,10 +1149,14 @@ static ssize_t
 vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
 {
         struct vivi_dev *dev = video_drvdata(file);
+        int err;
 
         dprintk(dev, 1, "read called\n");
-        return vb2_read(&dev->vb_vidq, data, count, ppos,
+        mutex_lock(&dev->mutex);
+        err = vb2_read(&dev->vb_vidq, data, count, ppos,
                        file->f_flags & O_NONBLOCK);
+        mutex_unlock(&dev->mutex);
+        return err;
 }
 
 static unsigned int