rigol-ds: properly deal with dev_close() getting called multiple times

diff --git a/hardware/rigol-ds/api.c b/hardware/rigol-ds/api.c
index f61d58ca1e01993ac656fe6eb34fc6c5a3bb2fc2..ae14f067d3d1e2d2284009be4bdc3ba581573241 100644 (file)
--- a/hardware/rigol-ds/api.c
+++ b/hardware/rigol-ds/api.c
@@ -482,8 +482,8 @@ static int dev_close(struct sr_dev_inst *sdi)
        struct sr_scpi_dev_inst *scpi;
        struct dev_context *devc;
 
-       if (sdi->status != SR_ST_INACTIVE)
-               return SR_OK;
+       if (sdi->status != SR_ST_ACTIVE)
+               return SR_ERR_DEV_CLOSED;
 
        scpi = sdi->conn;
        devc = sdi->priv;