media: ti-vpe: vpe: Add missing null pointer checks

A few NULL pointer checks were missing.
Add check with appropriate return code.
Signed-off-by: Benoit Parrot <bparrot@ti.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/ti-vpe/vpe.c

@@ -1537,6 +1537,8 @@ static int vpe_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
 		return -EINVAL;
 
 	q_data = get_q_data(ctx, f->type);
+	if (!q_data)
+		return -EINVAL;
 
 	pix->width = q_data->width;
 	pix->height = q_data->height;
@@ -2001,6 +2003,8 @@ static int vpe_queue_setup(struct vb2_queue *vq,
 	struct vpe_q_data *q_data;
 
 	q_data = get_q_data(ctx, vq->type);
+	if (!q_data)
+		return -EINVAL;
 
 	*nplanes = q_data->nplanes;
 
@@ -2025,6 +2029,8 @@ static int vpe_buf_prepare(struct vb2_buffer *vb)
 	vpe_dbg(ctx->dev, "type: %d\n", vb->vb2_queue->type);
 
 	q_data = get_q_data(ctx, vb->vb2_queue->type);
+	if (!q_data)
+		return -EINVAL;
 	num_planes = q_data->nplanes;
 
 	if (vb->vb2_queue->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
@@ -2481,7 +2487,12 @@ static int vpe_probe(struct platform_device *pdev)
 	mutex_init(&dev->dev_mutex);
 
 	dev->res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-			"vpe_top");
+						"vpe_top");
+	if (!dev->res) {
+		dev_err(&pdev->dev, "missing 'vpe_top' resources data\n");
+		return -ENODEV;
+	}
+
 	/*
 	 * HACK: we get resource info from device tree in the form of a list of
 	 * VPE sub blocks, the driver currently uses only the base of vpe_top