media: mediatek: vcodec: Handle invalid decoder vsi

commit 59d438f8e02ca641c58d77e1feffa000ff809e9f upstream.

Handle an invalid decoder vsi in vpu_dec_init to ensure the decoder vsi
is valid for future use.

Fixes: 590577a ("[media] vcodec: mediatek: Add Mediatek V4L2 Video Decoder Driver")

Signed-off-by: Irui Wang <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Signed-off-by: Sebastian Fricke <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>
[ Replace mtk_vdec_err with mtk_vcodec_err to make it work on 6.1.y ]
Signed-off-by: Alva Lan <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: irui-wang

drivers/media/platform/mediatek/vcodec/vdec_vpu_if.c

@@ -213,6 +213,12 @@ int vpu_dec_init(struct vdec_vpu_inst *vpu)
 	mtk_vcodec_debug(vpu, "vdec_inst=%p", vpu);
 
 	err = vcodec_vpu_send_msg(vpu, (void *)&msg, sizeof(msg));
+
+	if (IS_ERR_OR_NULL(vpu->vsi)) {
+		mtk_vcodec_err(vpu, "invalid vdec vsi, status=%d", err);
+		return -EINVAL;
+	}
+
 	mtk_vcodec_debug(vpu, "- ret=%d", err);
 	return err;
 }