diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c
index 16ae66f5584fb3e9529ec1ec97a5ca5a8358e34e..6c33b788ecd7f94a27eff173f4b6f5ab485e69f0 100644
--- a/drivers/media/v4l2-core/videobuf2-core.c
+++ b/drivers/media/v4l2-core/videobuf2-core.c
@@ -377,8 +377,10 @@ static int __vb2_queue_free(struct vb2_queue *q, unsigned int buffers)
 	/* Call driver-provided cleanup function for each buffer, if provided */
 	for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
 	     ++buffer) {
-		if (q->bufs[buffer])
-			call_vb_qop(q->bufs[buffer], buf_cleanup, q->bufs[buffer]);
+		struct vb2_buffer *vb = q->bufs[buffer];
+
+		if (vb && vb->planes[0].mem_priv)
+			call_vb_qop(vb, buf_cleanup, vb);
 	}
 
 	/* Release video buffer memory */
@@ -1196,6 +1198,7 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 	unsigned int plane;
 	int ret;
 	int write = !V4L2_TYPE_IS_OUTPUT(q->type);
+	bool reacquired = vb->planes[0].mem_priv == NULL;
 
 	/* Copy relevant information provided by the userspace */
 	__fill_vb2_buffer(vb, b, planes);
@@ -1221,12 +1224,16 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 		}
 
 		/* Release previously acquired memory if present */
-		if (vb->planes[plane].mem_priv)
+		if (vb->planes[plane].mem_priv) {
+			if (!reacquired) {
+				reacquired = true;
+				call_vb_qop(vb, buf_cleanup, vb);
+			}
 			call_memop(vb, put_userptr, vb->planes[plane].mem_priv);
+		}
 
 		vb->planes[plane].mem_priv = NULL;
-		vb->v4l2_planes[plane].m.userptr = 0;
-		vb->v4l2_planes[plane].length = 0;
+		memset(&vb->v4l2_planes[plane], 0, sizeof(struct v4l2_plane));
 
 		/* Acquire each plane's memory */
 		mem_priv = call_memop(vb, get_userptr, q->alloc_ctx[plane],
@@ -1242,17 +1249,6 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 		vb->planes[plane].mem_priv = mem_priv;
 	}
 
-	/*
-	 * Call driver-specific initialization on the newly acquired buffer,
-	 * if provided.
-	 */
-	ret = call_vb_qop(vb, buf_init, vb);
-	if (ret) {
-		dprintk(1, "qbuf: buffer initialization failed\n");
-		fail_vb_qop(vb, buf_init);
-		goto err;
-	}
-
 	/*
 	 * Now that everything is in order, copy relevant information
 	 * provided by userspace.
@@ -1260,6 +1256,28 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 	for (plane = 0; plane < vb->num_planes; ++plane)
 		vb->v4l2_planes[plane] = planes[plane];
 
+	if (reacquired) {
+		/*
+		 * One or more planes changed, so we must call buf_init to do
+		 * the driver-specific initialization on the newly acquired
+		 * buffer, if provided.
+		 */
+		ret = call_vb_qop(vb, buf_init, vb);
+		if (ret) {
+			dprintk(1, "qbuf: buffer initialization failed\n");
+			fail_vb_qop(vb, buf_init);
+			goto err;
+		}
+	}
+
+	ret = call_vb_qop(vb, buf_prepare, vb);
+	if (ret) {
+		dprintk(1, "qbuf: buffer preparation failed\n");
+		fail_vb_qop(vb, buf_prepare);
+		call_vb_qop(vb, buf_cleanup, vb);
+		goto err;
+	}
+
 	return 0;
 err:
 	/* In case of errors, release planes that were already acquired */
@@ -1279,8 +1297,13 @@ static int __qbuf_userptr(struct vb2_buffer *vb, const struct v4l2_buffer *b)
  */
 static int __qbuf_mmap(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 {
+	int ret;
+
 	__fill_vb2_buffer(vb, b, vb->v4l2_planes);
-	return 0;
+	ret = call_vb_qop(vb, buf_prepare, vb);
+	if (ret)
+		fail_vb_qop(vb, buf_prepare);
+	return ret;
 }
 
 /**
@@ -1294,6 +1317,7 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 	unsigned int plane;
 	int ret;
 	int write = !V4L2_TYPE_IS_OUTPUT(q->type);
+	bool reacquired = vb->planes[0].mem_priv == NULL;
 
 	/* Copy relevant information provided by the userspace */
 	__fill_vb2_buffer(vb, b, planes);
@@ -1329,6 +1353,11 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 
 		dprintk(1, "qbuf: buffer for plane %d changed\n", plane);
 
+		if (!reacquired) {
+			reacquired = true;
+			call_vb_qop(vb, buf_cleanup, vb);
+		}
+
 		/* Release previously acquired memory if present */
 		__vb2_plane_dmabuf_put(vb, &vb->planes[plane]);
 		memset(&vb->v4l2_planes[plane], 0, sizeof(struct v4l2_plane));
@@ -1363,17 +1392,6 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 		vb->planes[plane].dbuf_mapped = 1;
 	}
 
-	/*
-	 * Call driver-specific initialization on the newly acquired buffer,
-	 * if provided.
-	 */
-	ret = call_vb_qop(vb, buf_init, vb);
-	if (ret) {
-		dprintk(1, "qbuf: buffer initialization failed\n");
-		fail_vb_qop(vb, buf_init);
-		goto err;
-	}
-
 	/*
 	 * Now that everything is in order, copy relevant information
 	 * provided by userspace.
@@ -1381,6 +1399,27 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 	for (plane = 0; plane < vb->num_planes; ++plane)
 		vb->v4l2_planes[plane] = planes[plane];
 
+	if (reacquired) {
+		/*
+		 * Call driver-specific initialization on the newly acquired buffer,
+		 * if provided.
+		 */
+		ret = call_vb_qop(vb, buf_init, vb);
+		if (ret) {
+			dprintk(1, "qbuf: buffer initialization failed\n");
+			fail_vb_qop(vb, buf_init);
+			goto err;
+		}
+	}
+
+	ret = call_vb_qop(vb, buf_prepare, vb);
+	if (ret) {
+		dprintk(1, "qbuf: buffer preparation failed\n");
+		fail_vb_qop(vb, buf_prepare);
+		call_vb_qop(vb, buf_cleanup, vb);
+		goto err;
+	}
+
 	return 0;
 err:
 	/* In case of errors, release planes that were already acquired */
@@ -1459,11 +1498,6 @@ static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer *b)
 		ret = -EINVAL;
 	}
 
-	if (!ret) {
-		ret = call_vb_qop(vb, buf_prepare, vb);
-		if (ret)
-			fail_vb_qop(vb, buf_prepare);
-	}
 	if (ret)
 		dprintk(1, "qbuf: buffer preparation failed: %d\n", ret);
 	vb->state = ret ? VB2_BUF_STATE_DEQUEUED : VB2_BUF_STATE_PREPARED;