diff --git a/src/hardware/agilent-dmm/api.c b/src/hardware/agilent-dmm/api.c
index 514a2d27..78e7efe8 100644
--- a/src/hardware/agilent-dmm/api.c
+++ b/src/hardware/agilent-dmm/api.c
@@ -83,7 +83,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	char *buf, **tokens;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	devices = NULL;
 	conn = serialcomm = NULL;
diff --git a/src/hardware/appa-55ii/api.c b/src/hardware/appa-55ii/api.c
index d6c5d6a9..c5700011 100644
--- a/src/hardware/appa-55ii/api.c
+++ b/src/hardware/appa-55ii/api.c
@@ -81,7 +81,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	sr_info("Probing serial port %s.", conn);
 
 	drvc = di->context;
-	drvc->instances = NULL;
 	serial_flush(serial);
 
 	/* Let's get a bit of data and see if we can find a packet. */
diff --git a/src/hardware/arachnid-labs-re-load-pro/api.c b/src/hardware/arachnid-labs-re-load-pro/api.c
index aeacda10..6deb6815 100644
--- a/src/hardware/arachnid-labs-re-load-pro/api.c
+++ b/src/hardware/arachnid-labs-re-load-pro/api.c
@@ -74,7 +74,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 
 	devices = NULL;
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	conn = serialcomm = NULL;
 	for (l = options; l; l = l->next) {
diff --git a/src/hardware/atten-pps3xxx/api.c b/src/hardware/atten-pps3xxx/api.c
index e1ec5f0b..7fd3b678 100644
--- a/src/hardware/atten-pps3xxx/api.c
+++ b/src/hardware/atten-pps3xxx/api.c
@@ -94,7 +94,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options, int modelid)
 
 	devices = NULL;
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	conn = serialcomm = NULL;
 	for (l = options; l; l = l->next) {
diff --git a/src/hardware/beaglelogic/api.c b/src/hardware/beaglelogic/api.c
index 6deafb81..10f9a0fb 100644
--- a/src/hardware/beaglelogic/api.c
+++ b/src/hardware/beaglelogic/api.c
@@ -82,7 +82,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 
 	devices = NULL;
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	/* Probe for /dev/beaglelogic */
 	if (!g_file_test(BEAGLELOGIC_DEV_NODE, G_FILE_TEST_EXISTS))
diff --git a/src/hardware/brymen-bm86x/api.c b/src/hardware/brymen-bm86x/api.c
index eb41b845..64acf323 100644
--- a/src/hardware/brymen-bm86x/api.c
+++ b/src/hardware/brymen-bm86x/api.c
@@ -44,7 +44,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	const char *conn;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	conn = BRYMEN_BC86X;
 	for (l = options; l; l = l->next) {
diff --git a/src/hardware/brymen-dmm/api.c b/src/hardware/brymen-dmm/api.c
index 595ea99b..0e9034d3 100644
--- a/src/hardware/brymen-dmm/api.c
+++ b/src/hardware/brymen-dmm/api.c
@@ -97,7 +97,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 
 	devices = NULL;
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	conn = serialcomm = NULL;
 	for (l = options; l; l = l->next) {
diff --git a/src/hardware/chronovu-la/api.c b/src/hardware/chronovu-la/api.c
index 5c58e4f9..d1a7ec71 100644
--- a/src/hardware/chronovu-la/api.c
+++ b/src/hardware/chronovu-la/api.c
@@ -149,7 +149,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	char product[64], serial_num[64], connection_id[64];
 
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	conn = NULL;
 	for (l = options; l; l = l->next) {
diff --git a/src/hardware/colead-slm/api.c b/src/hardware/colead-slm/api.c
index bbb6a957..bc59fd63 100644
--- a/src/hardware/colead-slm/api.c
+++ b/src/hardware/colead-slm/api.c
@@ -52,7 +52,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	const char *conn, *serialcomm;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	devices = NULL;
 
diff --git a/src/hardware/conrad-digi-35-cpu/api.c b/src/hardware/conrad-digi-35-cpu/api.c
index 63c0e4f1..44f9f266 100644
--- a/src/hardware/conrad-digi-35-cpu/api.c
+++ b/src/hardware/conrad-digi-35-cpu/api.c
@@ -50,7 +50,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 
 	devices = NULL;
 	drvc = di->context;
-	drvc->instances = NULL;
 	conn = serialcomm = NULL;
 
 	for (l = options; l; l = l->next) {
diff --git a/src/hardware/ftdi-la/api.c b/src/hardware/ftdi-la/api.c
index 7bf0e13d..5f5639f9 100644
--- a/src/hardware/ftdi-la/api.c
+++ b/src/hardware/ftdi-la/api.c
@@ -209,7 +209,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	int i;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 	conn = NULL;
 	for (l = options; l; l = l->next) {
 		src = l->data;
diff --git a/src/hardware/gmc-mh-1x-2x/api.c b/src/hardware/gmc-mh-1x-2x/api.c
index 629a3f2b..7ba93e4e 100644
--- a/src/hardware/gmc-mh-1x-2x/api.c
+++ b/src/hardware/gmc-mh-1x-2x/api.c
@@ -155,7 +155,6 @@ static GSList *scan_1x_2x_rs232(struct sr_dev_driver *di, GSList *options)
 
 	devices = NULL;
 	drvc = di->context;
-	drvc->instances = NULL;
 	conn = serialcomm = NULL;
 	serialcomm_given = FALSE;
 
@@ -249,7 +248,6 @@ static GSList *scan_2x_bd232(struct sr_dev_driver *di, GSList *options)
 	devices = NULL;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	sr_spew("scan_2x_bd232() called!");
 
diff --git a/src/hardware/ikalogic-scanalogic2/api.c b/src/hardware/ikalogic-scanalogic2/api.c
index c30c605c..0c6b8987 100644
--- a/src/hardware/ikalogic-scanalogic2/api.c
+++ b/src/hardware/ikalogic-scanalogic2/api.c
@@ -67,7 +67,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 
 	devices = NULL;
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_VID_PID);
 
diff --git a/src/hardware/kecheng-kc-330b/api.c b/src/hardware/kecheng-kc-330b/api.c
index f67d2532..fcd08eca 100644
--- a/src/hardware/kecheng-kc-330b/api.c
+++ b/src/hardware/kecheng-kc-330b/api.c
@@ -112,7 +112,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	(void)options;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	devices = NULL;
 	if ((usb_devices = sr_usb_find(drvc->sr_ctx->libusb_ctx, USB_CONN))) {
diff --git a/src/hardware/korad-kaxxxxp/api.c b/src/hardware/korad-kaxxxxp/api.c
index 02abc7ca..bd80b6e1 100644
--- a/src/hardware/korad-kaxxxxp/api.c
+++ b/src/hardware/korad-kaxxxxp/api.c
@@ -79,7 +79,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	conn = NULL;
 	serialcomm = NULL;
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	for (l = options; l; l = l->next) {
 		src = l->data;
diff --git a/src/hardware/lecroy-logicstudio/api.c b/src/hardware/lecroy-logicstudio/api.c
index 20ffcf2f..69852b28 100644
--- a/src/hardware/lecroy-logicstudio/api.c
+++ b/src/hardware/lecroy-logicstudio/api.c
@@ -120,7 +120,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	(void)options;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	devices = NULL;
 
diff --git a/src/hardware/manson-hcs-3xxx/api.c b/src/hardware/manson-hcs-3xxx/api.c
index 52695b0b..0b0a053e 100644
--- a/src/hardware/manson-hcs-3xxx/api.c
+++ b/src/hardware/manson-hcs-3xxx/api.c
@@ -86,7 +86,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	char reply[50], **tokens, *dummy;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 	devices = NULL;
 	conn = NULL;
 	serialcomm = NULL;
diff --git a/src/hardware/motech-lps-30x/api.c b/src/hardware/motech-lps-30x/api.c
index 1c5e3876..ce3294e9 100644
--- a/src/hardware/motech-lps-30x/api.c
+++ b/src/hardware/motech-lps-30x/api.c
@@ -384,7 +384,6 @@ static GSList *do_scan(lps_modelid modelid, struct sr_dev_driver *drv, GSList *o
 	devices = NULL;
 
 	drvc = drv->context;
-	drvc->instances = NULL;
 
 	sr_spew("scan() called!");
 
diff --git a/src/hardware/norma-dmm/api.c b/src/hardware/norma-dmm/api.c
index ee1c59ca..024bcaed 100644
--- a/src/hardware/norma-dmm/api.c
+++ b/src/hardware/norma-dmm/api.c
@@ -80,7 +80,6 @@ static GSList *scan(struct sr_dev_driver *drv, GSList *options)
 
 	devices = NULL;
 	drvc = drv->context;
-	drvc->instances = NULL;
 	conn = serialcomm = NULL;
 
 	for (l = options; l; l = l->next) {
diff --git a/src/hardware/teleinfo/api.c b/src/hardware/teleinfo/api.c
index f05db75a..f5920c5b 100644
--- a/src/hardware/teleinfo/api.c
+++ b/src/hardware/teleinfo/api.c
@@ -74,7 +74,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	sr_info("Probing serial port %s.", conn);
 
 	drvc = di->context;
-	drvc->instances = NULL;
 	serial_flush(serial);
 
 	/* Let's get a bit of data and see if we can find a packet. */
diff --git a/src/hardware/testo/api.c b/src/hardware/testo/api.c
index 8e60f6b8..505df675 100644
--- a/src/hardware/testo/api.c
+++ b/src/hardware/testo/api.c
@@ -58,7 +58,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 
 	devices = NULL;
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	conn_devices = NULL;
 	for (l = options; l; l = l->next) {
diff --git a/src/hardware/tondaj-sl-814/api.c b/src/hardware/tondaj-sl-814/api.c
index f647b6a9..d79bc03d 100644
--- a/src/hardware/tondaj-sl-814/api.c
+++ b/src/hardware/tondaj-sl-814/api.c
@@ -50,7 +50,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	struct sr_serial_dev_inst *serial;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	devices = NULL;
 
diff --git a/src/hardware/uni-t-ut32x/api.c b/src/hardware/uni-t-ut32x/api.c
index 789b72de..147ac7df 100644
--- a/src/hardware/uni-t-ut32x/api.c
+++ b/src/hardware/uni-t-ut32x/api.c
@@ -48,7 +48,6 @@ static GSList *scan(struct sr_dev_driver *di, GSList *options)
 	const char *conn;
 
 	drvc = di->context;
-	drvc->instances = NULL;
 
 	conn = NULL;
 	for (l = options; l; l = l->next) {