X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=src%2Fdevice.c;fp=src%2Fdevice.c;h=e5cbf4ef2868473e1c689e0752361d5f9e35c998;hb=6402c379161ec138e451901c411817a55846a75b;hp=6eff16d16573e45c78f0e836a168ff72ff15d31f;hpb=093e1cba6b7bf14cfb77fa36f59b0c16e6fca7cc;p=libsigrok.git

diff --git a/src/device.c b/src/device.c
index 6eff16d1..e5cbf4ef 100644
--- a/src/device.c
+++ b/src/device.c
@@ -560,6 +560,14 @@ SR_API int sr_dev_open(struct sr_dev_inst *sdi)
 	if (!sdi || !sdi->driver || !sdi->driver->dev_open)
 		return SR_ERR;
 
+	if (sdi->status == SR_ST_ACTIVE) {
+		sr_err("%s: Device instance already active, can't re-open.",
+			sdi->driver->name);
+		return SR_ERR;
+	}
+
+	sr_dbg("%s: Opening device.", sdi->driver->name)
+
 	ret = sdi->driver->dev_open(sdi);
 
 	return ret;