d4xx: Locking on mux open and close

IntelRealSense · Oct 30, 2024 · 63e3c09 · 63e3c09
1 parent 315b6ae
commit 63e3c09
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/kernel/realsense/d4xx.c b/kernel/realsense/d4xx.c
@@ -2827,9 +2827,16 @@ static int ds5_mux_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 	struct ds5 *state = v4l2_get_subdevdata(sd);
 
 	dev_dbg(sd->dev, "%s(): %s (%p)\n", __func__, sd->name, fh);
+
+	mutex_lock(&state->lock);
 	if (state->dfu_dev.dfu_state_flag)
+	{
+		mutex_unlock(&state->lock);
 		return -EBUSY;
+	}
+
 	state->dfu_dev.device_open_count++;
+	mutex_unlock(&state->lock);
 
 	return 0;
 };
@@ -2839,7 +2846,9 @@ static int ds5_mux_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
 	struct ds5 *state = v4l2_get_subdevdata(sd);
 
 	dev_dbg(sd->dev, "%s(): %s (%p)\n", __func__, sd->name, fh);
+	mutex_lock(&state->lock);
 	state->dfu_dev.device_open_count--;
+	mutex_unlock(&state->lock);
 	return 0;
 };