From: Uwe Hermann <redacted>
Date: Fri, 7 Jul 2017 18:42:04 +0000 (+0200)
Subject: sr_dev_close(): Set status to SR_ST_INACTIVE.
X-Git-Url: http://sigrok.org/gitweb/?p=libsigrok.git;a=commitdiff_plain;h=f1ba6b4b2c9a8ecf90bb31efb218752aa7e49d1a

sr_dev_close(): Set status to SR_ST_INACTIVE.

This ensures consistent checks and log messages across all drivers
and reduces the per-driver boilerplate.
---

diff --git a/src/device.c b/src/device.c
index 14b56b2f..9ba8bfc5 100644
--- a/src/device.c
+++ b/src/device.c
@@ -585,11 +585,21 @@ SR_API int sr_dev_open(struct sr_dev_inst *sdi)
 }
 
 /**
- * Close the specified device.
+ * Close the specified device instance.
+ *
+ * If the device instance is not open (sdi->status != SR_ST_ACTIVE),
+ * SR_ERR_DEV_CLOSED will be returned and no closing will be attempted.
+ *
+ * Note: sdi->status will be set to SR_ST_INACTIVE, regardless of whether
+ * there are any errors during closing of the device instance (any errors
+ * will be reported via error code and log message, though).
  *
  * @param sdi Device instance to use. Must not be NULL.
  *
- * @return SR_OK upon success, a negative error code upon errors.
+ * @retval SR_OK Success.
+ * @retval SR_ERR_ARG Invalid arguments.
+ * @retval SR_ERR_DEV_CLOSED Device instance was not active.
+ * @retval SR_ERR Other error.
  *
  * @since 0.2.0
  */
@@ -598,7 +608,7 @@ SR_API int sr_dev_close(struct sr_dev_inst *sdi)
 	int ret;
 
 	if (!sdi || !sdi->driver || !sdi->driver->dev_close)
-		return SR_ERR;
+		return SR_ERR_ARG;
 
 	if (sdi->status != SR_ST_ACTIVE) {
 		sr_err("%s: Device instance not active, can't close.",
@@ -606,7 +616,9 @@ SR_API int sr_dev_close(struct sr_dev_inst *sdi)
 		return SR_ERR_DEV_CLOSED;
 	}
 
-	sr_dbg("%s: Closing device.", sdi->driver->name)
+	sdi->status = SR_ST_INACTIVE;
+
+	sr_dbg("%s: Closing device instance.", sdi->driver->name);
 
 	ret = sdi->driver->dev_close(sdi);
 
diff --git a/src/hardware/asix-sigma/api.c b/src/hardware/asix-sigma/api.c
index 50a1d489..41a775a5 100644
--- a/src/hardware/asix-sigma/api.c
+++ b/src/hardware/asix-sigma/api.c
@@ -156,11 +156,7 @@ static int dev_close(struct sr_dev_inst *sdi)
 
 	devc = sdi->priv;
 
-	ftdi_usb_close(&devc->ftdic);
-
-	sdi->status = SR_ST_INACTIVE;
-
-	return SR_OK;
+	return (ftdi_usb_close(&devc->ftdic) == 0) ? SR_OK : SR_ERR;
 }
 
 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
diff --git a/src/hardware/atten-pps3xxx/api.c b/src/hardware/atten-pps3xxx/api.c
index 6458ebf4..59252838 100644
--- a/src/hardware/atten-pps3xxx/api.c
+++ b/src/hardware/atten-pps3xxx/api.c
@@ -421,6 +421,7 @@ static int dev_close(struct sr_dev_inst *sdi)
 	struct dev_context *devc;
 
 	devc = sdi->priv;
+
 	if (devc->config_dirty)
 		/* Some configuration changes were queued up but didn't
 		 * get sent to the device, likely because we were never
diff --git a/src/hardware/baylibre-acme/api.c b/src/hardware/baylibre-acme/api.c
index fff5e8da..c45ab77d 100644
--- a/src/hardware/baylibre-acme/api.c
+++ b/src/hardware/baylibre-acme/api.c
@@ -137,8 +137,6 @@ static int dev_close(struct sr_dev_inst *sdi)
 {
 	(void)sdi;
 
-	sdi->status = SR_ST_INACTIVE;
-
 	return SR_OK;
 }
 
diff --git a/src/hardware/beaglelogic/api.c b/src/hardware/beaglelogic/api.c
index d8329897..ff8f0424 100644
--- a/src/hardware/beaglelogic/api.c
+++ b/src/hardware/beaglelogic/api.c
@@ -168,8 +168,6 @@ static int dev_close(struct sr_dev_inst *sdi)
 	beaglelogic_munmap(devc);
 	beaglelogic_close(devc);
 
-	sdi->status = SR_ST_INACTIVE;
-
 	return SR_OK;
 }
 
diff --git a/src/hardware/brymen-bm86x/api.c b/src/hardware/brymen-bm86x/api.c
index 44424241..23b42e13 100644
--- a/src/hardware/brymen-bm86x/api.c
+++ b/src/hardware/brymen-bm86x/api.c
@@ -134,24 +134,18 @@ static int dev_close(struct sr_dev_inst *sdi)
 
 	if ((ret = libusb_release_interface(usb->devhdl, 0)))
 		sr_err("Failed to release interface 0: %s.\n", libusb_error_name(ret));
-	else
-		sr_dbg("Successfully released interface 0.\n");
 
 	if (!ret && devc->detached_kernel_driver) {
-		if ((ret = libusb_attach_kernel_driver(usb->devhdl, 0))) {
+		if ((ret = libusb_attach_kernel_driver(usb->devhdl, 0)))
 			sr_err("Failed to attach kernel driver: %s.\n",
 			       libusb_error_name(ret));
-		} else {
+		else
 			devc->detached_kernel_driver = 0;
-			sr_dbg("Successfully attached kernel driver.\n");
-		}
 	}
 
 	libusb_close(usb->devhdl);
 
-	sdi->status = SR_ST_INACTIVE;
-
-	return ret;
+	return (ret == 0) ? SR_OK : SR_ERR;
 }
 
 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
diff --git a/src/hardware/chronovu-la/api.c b/src/hardware/chronovu-la/api.c
index 1bfc82e6..0c94b398 100644
--- a/src/hardware/chronovu-la/api.c
+++ b/src/hardware/chronovu-la/api.c
@@ -287,13 +287,14 @@ static int dev_close(struct sr_dev_inst *sdi)
 
 	devc = sdi->priv;
 
-	if (devc->ftdic && (ret = ftdi_usb_close(devc->ftdic)) < 0)
+	if (!devc->ftdic)
+		return SR_ERR_BUG;
+
+	if ((ret = ftdi_usb_close(devc->ftdic)) < 0)
 		sr_err("Failed to close FTDI device (%d): %s.",
 		       ret, ftdi_get_error_string(devc->ftdic));
 
-	sdi->status = SR_ST_INACTIVE;
-
-	return SR_OK;
+	return (ret == 0) ? SR_OK : SR_ERR;
 }
 
 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
diff --git a/src/hardware/demo/api.c b/src/hardware/demo/api.c
index 3f4ae41e..0dd0a38a 100644
--- a/src/hardware/demo/api.c
+++ b/src/hardware/demo/api.c
@@ -189,7 +189,7 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	sdi->status = SR_ST_INACTIVE;
+	(void)sdi;
 
 	return SR_OK;
 }
diff --git a/src/hardware/dreamsourcelab-dslogic/api.c b/src/hardware/dreamsourcelab-dslogic/api.c
index e9e44502..d11861bb 100644
--- a/src/hardware/dreamsourcelab-dslogic/api.c
+++ b/src/hardware/dreamsourcelab-dslogic/api.c
@@ -382,14 +382,13 @@ static int dev_close(struct sr_dev_inst *sdi)
 	usb = sdi->conn;
 
 	if (!usb->devhdl)
-		return SR_ERR;
+		return SR_ERR_BUG;
 
 	sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 		usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 	libusb_release_interface(usb->devhdl, USB_INTERFACE);
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/hardware/ftdi-la/api.c b/src/hardware/ftdi-la/api.c
index 3a3a8861..5a7ac51e 100644
--- a/src/hardware/ftdi-la/api.c
+++ b/src/hardware/ftdi-la/api.c
@@ -319,13 +319,12 @@ static int dev_close(struct sr_dev_inst *sdi)
 
 	devc = sdi->priv;
 
-	if (devc->ftdic) {
-		ftdi_usb_close(devc->ftdic);
-		ftdi_free(devc->ftdic);
-		devc->ftdic = NULL;
-	}
+	if (!devc->ftdic)
+		return SR_ERR_BUG;
 
-	sdi->status = SR_ST_INACTIVE;
+	ftdi_usb_close(devc->ftdic);
+	ftdi_free(devc->ftdic);
+	devc->ftdic = NULL;
 
 	return SR_OK;
 }
diff --git a/src/hardware/fx2lafw/api.c b/src/hardware/fx2lafw/api.c
index 879fdf04..547f7229 100644
--- a/src/hardware/fx2lafw/api.c
+++ b/src/hardware/fx2lafw/api.c
@@ -438,14 +438,13 @@ static int dev_close(struct sr_dev_inst *sdi)
 	usb = sdi->conn;
 
 	if (!usb->devhdl)
-		return SR_ERR;
+		return SR_ERR_BUG;
 
 	sr_info("fx2lafw: Closing device on %d.%d (logical) / %s (physical) interface %d.",
 		usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 	libusb_release_interface(usb->devhdl, USB_INTERFACE);
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/hardware/gmc-mh-1x-2x/api.c b/src/hardware/gmc-mh-1x-2x/api.c
index 992cbd81..8bac10f1 100644
--- a/src/hardware/gmc-mh-1x-2x/api.c
+++ b/src/hardware/gmc-mh-1x-2x/api.c
@@ -334,12 +334,11 @@ static int dev_close(struct sr_dev_inst *sdi)
 {
 	struct dev_context *devc;
 
-	std_serial_dev_close(sdi);
+	devc = sdi->priv;
 
-	if ((devc = sdi->priv))
-		devc->model = METRAHIT_NONE;
+	devc->model = METRAHIT_NONE;
 
-	return SR_OK;
+	return std_serial_dev_close(sdi);
 }
 
 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
diff --git a/src/hardware/gwinstek-gds-800/api.c b/src/hardware/gwinstek-gds-800/api.c
index 30407c3f..0b8262cd 100644
--- a/src/hardware/gwinstek-gds-800/api.c
+++ b/src/hardware/gwinstek-gds-800/api.c
@@ -106,13 +106,11 @@ static int dev_close(struct sr_dev_inst *sdi)
 	struct sr_scpi_dev_inst *scpi;
 
 	scpi = sdi->conn;
-	if (scpi) {
-		if (sr_scpi_close(scpi) < 0)
-			return SR_ERR;
-		sdi->status = SR_ST_INACTIVE;
-	}
 
-	return SR_OK;
+	if (!scpi)
+		return SR_ERR_BUG;
+
+	return sr_scpi_close(scpi);
 }
 
 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
diff --git a/src/hardware/hameg-hmo/api.c b/src/hardware/hameg-hmo/api.c
index 8e15a20d..9245869b 100644
--- a/src/hardware/hameg-hmo/api.c
+++ b/src/hardware/hameg-hmo/api.c
@@ -142,11 +142,7 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	sr_scpi_close(sdi->conn);
-
-	sdi->status = SR_ST_INACTIVE;
-
-	return SR_OK;
+	return sr_scpi_close(sdi->conn);
 }
 
 static int check_channel_group(struct dev_context *devc,
diff --git a/src/hardware/hp-3457a/api.c b/src/hardware/hp-3457a/api.c
index 19e42027..f58cfef9 100644
--- a/src/hardware/hp-3457a/api.c
+++ b/src/hardware/hp-3457a/api.c
@@ -219,8 +219,6 @@ static int dev_close(struct sr_dev_inst *sdi)
 
 	sr_scpi_close(scpi);
 
-	sdi->status = SR_ST_INACTIVE;
-
 	return SR_OK;
 }
 
diff --git a/src/hardware/hung-chang-dso-2100/api.c b/src/hardware/hung-chang-dso-2100/api.c
index b6a1be5a..0aa012a1 100644
--- a/src/hardware/hung-chang-dso-2100/api.c
+++ b/src/hardware/hung-chang-dso-2100/api.c
@@ -282,8 +282,6 @@ static int dev_close(struct sr_dev_inst *sdi)
 	ieee1284_release(sdi->conn);
 	ieee1284_close(sdi->conn);
 
-	sdi->status = SR_ST_INACTIVE;
-
 	return SR_OK;
 }
 
diff --git a/src/hardware/ikalogic-scanalogic2/api.c b/src/hardware/ikalogic-scanalogic2/api.c
index d13abf31..b4168513 100644
--- a/src/hardware/ikalogic-scanalogic2/api.c
+++ b/src/hardware/ikalogic-scanalogic2/api.c
@@ -242,13 +242,12 @@ static int dev_close(struct sr_dev_inst *sdi)
 	usb = sdi->conn;
 
 	if (!usb->devhdl)
-		return SR_OK;
+		return SR_ERR_BUG;
 
 	libusb_release_interface(usb->devhdl, USB_INTERFACE);
 	libusb_close(usb->devhdl);
 
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/hardware/ikalogic-scanaplus/api.c b/src/hardware/ikalogic-scanaplus/api.c
index 8d22fa0b..79585f06 100644
--- a/src/hardware/ikalogic-scanaplus/api.c
+++ b/src/hardware/ikalogic-scanaplus/api.c
@@ -221,8 +221,6 @@ static int dev_close(struct sr_dev_inst *sdi)
 
 	devc = sdi->priv;
 
-	sdi->status = SR_ST_INACTIVE;
-
 	return scanaplus_close(devc);
 }
 
diff --git a/src/hardware/kecheng-kc-330b/api.c b/src/hardware/kecheng-kc-330b/api.c
index 02c83e4c..fa50dd69 100644
--- a/src/hardware/kecheng-kc-330b/api.c
+++ b/src/hardware/kecheng-kc-330b/api.c
@@ -183,8 +183,7 @@ static int dev_close(struct sr_dev_inst *sdi)
 	usb = sdi->conn;
 
 	if (!usb->devhdl)
-		/* Nothing to do. */
-		return SR_OK;
+		return SR_ERR_BUG;
 
 	/* This allows a frontend to configure the device without ever
 	 * doing an acquisition step. */
@@ -195,7 +194,6 @@ static int dev_close(struct sr_dev_inst *sdi)
 	libusb_release_interface(usb->devhdl, USB_INTERFACE);
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/hardware/lascar-el-usb/api.c b/src/hardware/lascar-el-usb/api.c
index 7c7eda9e..9801732a 100644
--- a/src/hardware/lascar-el-usb/api.c
+++ b/src/hardware/lascar-el-usb/api.c
@@ -108,13 +108,11 @@ static int dev_close(struct sr_dev_inst *sdi)
 	usb = sdi->conn;
 
 	if (!usb->devhdl)
-		/* Nothing to do. */
-		return SR_OK;
+		return SR_ERR_BUG;
 
 	libusb_release_interface(usb->devhdl, LASCAR_INTERFACE);
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/hardware/lecroy-logicstudio/api.c b/src/hardware/lecroy-logicstudio/api.c
index f177cabd..c3007e42 100644
--- a/src/hardware/lecroy-logicstudio/api.c
+++ b/src/hardware/lecroy-logicstudio/api.c
@@ -337,15 +337,13 @@ static int dev_close(struct sr_dev_inst *sdi)
 	}
 
 	if (!usb->devhdl)
-		return SR_ERR;
+		return SR_ERR_BUG;
 
 	libusb_release_interface(usb->devhdl, 0);
 
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
 
-	sdi->status = SR_ST_INACTIVE;
-
 	return SR_OK;
 }
 
diff --git a/src/hardware/lecroy-xstream/api.c b/src/hardware/lecroy-xstream/api.c
index 50094a40..245c421a 100644
--- a/src/hardware/lecroy-xstream/api.c
+++ b/src/hardware/lecroy-xstream/api.c
@@ -146,11 +146,7 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	sr_scpi_close(sdi->conn);
-
-	sdi->status = SR_ST_INACTIVE;
-
-	return SR_OK;
+	return sr_scpi_close(sdi->conn);
 }
 
 static int config_get(uint32_t key, GVariant **data,
diff --git a/src/hardware/maynuo-m97/api.c b/src/hardware/maynuo-m97/api.c
index 451edeb2..23b0e68b 100644
--- a/src/hardware/maynuo-m97/api.c
+++ b/src/hardware/maynuo-m97/api.c
@@ -215,23 +215,21 @@ static int dev_close(struct sr_dev_inst *sdi)
 
 	modbus = sdi->conn;
 
-	if (modbus) {
-		devc = sdi->priv;
-		if (devc->expecting_registers) {
-			/* Wait for the last data that was requested from the device. */
-			uint16_t registers[devc->expecting_registers];
-			sr_modbus_read_holding_registers(modbus, -1,
-				devc->expecting_registers, registers);
-		}
+	if (!modbus)
+		return SR_ERR_BUG;
 
-		maynuo_m97_set_bit(modbus, PC1, 0);
+	devc = sdi->priv;
 
-		if (sr_modbus_close(modbus) < 0)
-			return SR_ERR;
-		sdi->status = SR_ST_INACTIVE;
+	if (devc->expecting_registers) {
+		/* Wait for the last data that was requested from the device. */
+		uint16_t registers[devc->expecting_registers];
+		sr_modbus_read_holding_registers(modbus, -1,
+			devc->expecting_registers, registers);
 	}
 
-	return SR_OK;
+	maynuo_m97_set_bit(modbus, PC1, 0);
+
+	return sr_modbus_close(modbus);
 }
 
 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
diff --git a/src/hardware/pipistrello-ols/api.c b/src/hardware/pipistrello-ols/api.c
index 8a0978b8..7dd94f8c 100644
--- a/src/hardware/pipistrello-ols/api.c
+++ b/src/hardware/pipistrello-ols/api.c
@@ -420,8 +420,6 @@ static int dev_close(struct sr_dev_inst *sdi)
 
 	devc = sdi->priv;
 
-	sdi->status = SR_ST_INACTIVE;
-
 	return p_ols_close(devc);
 }
 
diff --git a/src/hardware/rigol-ds/api.c b/src/hardware/rigol-ds/api.c
index 1e35a541..bd4c7118 100644
--- a/src/hardware/rigol-ds/api.c
+++ b/src/hardware/rigol-ds/api.c
@@ -456,16 +456,13 @@ static int dev_close(struct sr_dev_inst *sdi)
 	scpi = sdi->conn;
 	devc = sdi->priv;
 
+	if (!scpi)
+		return SR_ERR_BUG;
+
 	if (devc->model->series->protocol == PROTOCOL_V2)
 		rigol_ds_config_set(sdi, ":KEY:LOCK DISABLE");
 
-	if (scpi) {
-		if (sr_scpi_close(scpi) < 0)
-			return SR_ERR;
-		sdi->status = SR_ST_INACTIVE;
-	}
-
-	return SR_OK;
+	return sr_scpi_close(scpi);
 }
 
 static int analog_frame_size(const struct sr_dev_inst *sdi)
diff --git a/src/hardware/rohde-schwarz-sme-0x/api.c b/src/hardware/rohde-schwarz-sme-0x/api.c
index 3ca5441a..d449fddc 100644
--- a/src/hardware/rohde-schwarz-sme-0x/api.c
+++ b/src/hardware/rohde-schwarz-sme-0x/api.c
@@ -167,11 +167,7 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	sr_scpi_close(sdi->conn);
-
-	sdi->status = SR_ST_INACTIVE;
-
-	return SR_OK;
+	return sr_scpi_close(sdi->conn);
 }
 
 static int config_get(uint32_t key, GVariant **data,
diff --git a/src/hardware/saleae-logic-pro/api.c b/src/hardware/saleae-logic-pro/api.c
index 4dcd0aa9..a5b59e4f 100644
--- a/src/hardware/saleae-logic-pro/api.c
+++ b/src/hardware/saleae-logic-pro/api.c
@@ -210,11 +210,7 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	struct sr_usb_dev_inst *usb = sdi->conn;
-
-	sr_usb_close(usb);
-
-	sdi->status = SR_ST_INACTIVE;
+	sr_usb_close(sdi->conn);
 
 	return SR_OK;
 }
diff --git a/src/hardware/saleae-logic16/api.c b/src/hardware/saleae-logic16/api.c
index cfddfbb0..ff0af735 100644
--- a/src/hardware/saleae-logic16/api.c
+++ b/src/hardware/saleae-logic16/api.c
@@ -379,15 +379,15 @@ static int dev_close(struct sr_dev_inst *sdi)
 	struct sr_usb_dev_inst *usb;
 
 	usb = sdi->conn;
+
 	if (!usb->devhdl)
-		return SR_ERR;
+		return SR_ERR_BUG;
 
 	sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 		usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
 	libusb_release_interface(usb->devhdl, USB_INTERFACE);
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/hardware/scpi-pps/api.c b/src/hardware/scpi-pps/api.c
index 52b70d3e..707d2626 100644
--- a/src/hardware/scpi-pps/api.c
+++ b/src/hardware/scpi-pps/api.c
@@ -277,15 +277,15 @@ static int dev_close(struct sr_dev_inst *sdi)
 
 	devc = sdi->priv;
 	scpi = sdi->conn;
-	if (scpi) {
-		if (devc->beeper_was_set)
-			scpi_cmd(sdi, devc->device->commands, SCPI_CMD_BEEPER_ENABLE);
-		scpi_cmd(sdi, devc->device->commands, SCPI_CMD_LOCAL);
-		sr_scpi_close(scpi);
-		sdi->status = SR_ST_INACTIVE;
-	}
 
-	return SR_OK;
+	if (!scpi)
+		return SR_ERR_BUG;
+
+	if (devc->beeper_was_set)
+		scpi_cmd(sdi, devc->device->commands, SCPI_CMD_BEEPER_ENABLE);
+	scpi_cmd(sdi, devc->device->commands, SCPI_CMD_LOCAL);
+
+	return sr_scpi_close(scpi);
 }
 
 static void clear_helper(void *priv)
diff --git a/src/hardware/sysclk-lwla/api.c b/src/hardware/sysclk-lwla/api.c
index bb1e9e0b..34dc884d 100644
--- a/src/hardware/sysclk-lwla/api.c
+++ b/src/hardware/sysclk-lwla/api.c
@@ -324,8 +324,7 @@ static int dev_open(struct sr_dev_inst *sdi)
 	return ret;
 }
 
-/* Shutdown and close device.
- */
+/* Shutdown and close device. */
 static int dev_close(struct sr_dev_inst *sdi)
 {
 	struct dev_context *devc;
@@ -342,17 +341,16 @@ static int dev_close(struct sr_dev_inst *sdi)
 		return SR_ERR_BUG;
 	}
 
-	sdi->status = SR_ST_INACTIVE;
-
 	/* Download of the shutdown bitstream, if any. */
 	ret = (*devc->model->apply_fpga_config)(sdi);
 	if (ret != SR_OK)
 		sr_warn("Unable to shut down device.");
 
 	libusb_release_interface(usb->devhdl, USB_INTERFACE);
+
 	sr_usb_close(usb);
 
-	return ret;
+	return SR_OK;
 }
 
 /* Check whether the device options contain a specific key.
diff --git a/src/hardware/testo/api.c b/src/hardware/testo/api.c
index 933b86ba..548cdb3d 100644
--- a/src/hardware/testo/api.c
+++ b/src/hardware/testo/api.c
@@ -171,14 +171,13 @@ static int dev_close(struct sr_dev_inst *sdi)
 	struct sr_usb_dev_inst *usb;
 
 	usb = sdi->conn;
+
 	if (!usb->devhdl)
-		/* Nothing to do. */
-		return SR_OK;
+		return SR_ERR_BUG;
 
 	libusb_release_interface(usb->devhdl, 0);
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/hardware/uni-t-dmm/api.c b/src/hardware/uni-t-dmm/api.c
index 15976707..aff78b61 100644
--- a/src/hardware/uni-t-dmm/api.c
+++ b/src/hardware/uni-t-dmm/api.c
@@ -108,9 +108,9 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	/* TODO */
+	(void)sdi;
 
-	sdi->status = SR_ST_INACTIVE;
+	/* TODO */
 
 	return SR_OK;
 }
diff --git a/src/hardware/uni-t-ut32x/api.c b/src/hardware/uni-t-ut32x/api.c
index 532d428e..1d12a580 100644
--- a/src/hardware/uni-t-ut32x/api.c
+++ b/src/hardware/uni-t-ut32x/api.c
@@ -136,14 +136,13 @@ static int dev_close(struct sr_dev_inst *sdi)
 	struct sr_usb_dev_inst *usb;
 
 	usb = sdi->conn;
+
 	if (!usb->devhdl)
-		/* Nothing to do. */
-		return SR_OK;
+		return SR_ERR_BUG;
 
 	libusb_release_interface(usb->devhdl, USB_INTERFACE);
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/hardware/victor-dmm/api.c b/src/hardware/victor-dmm/api.c
index b8db2048..66eff890 100644
--- a/src/hardware/victor-dmm/api.c
+++ b/src/hardware/victor-dmm/api.c
@@ -131,13 +131,11 @@ static int dev_close(struct sr_dev_inst *sdi)
 	usb = sdi->conn;
 
 	if (!usb->devhdl)
-		/* Nothing to do. */
-		return SR_OK;
+		return SR_ERR_BUG;
 
 	libusb_release_interface(usb->devhdl, VICTOR_INTERFACE);
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/hardware/yokogawa-dlm/api.c b/src/hardware/yokogawa-dlm/api.c
index 30b3ca05..606dc2be 100644
--- a/src/hardware/yokogawa-dlm/api.c
+++ b/src/hardware/yokogawa-dlm/api.c
@@ -152,11 +152,7 @@ static int dev_open(struct sr_dev_inst *sdi)
 
 static int dev_close(struct sr_dev_inst *sdi)
 {
-	sr_scpi_close(sdi->conn);
-
-	sdi->status = SR_ST_INACTIVE;
-
-	return SR_OK;
+	return sr_scpi_close(sdi->conn);
 }
 
 /**
diff --git a/src/hardware/zeroplus-logic-cube/api.c b/src/hardware/zeroplus-logic-cube/api.c
index 20804ec9..8d530e57 100644
--- a/src/hardware/zeroplus-logic-cube/api.c
+++ b/src/hardware/zeroplus-logic-cube/api.c
@@ -319,7 +319,7 @@ static int dev_close(struct sr_dev_inst *sdi)
 	usb = sdi->conn;
 
 	if (!usb->devhdl)
-		return SR_ERR;
+		return SR_ERR_BUG;
 
 	sr_info("Closing device on %d.%d (logical) / %s (physical) interface %d.",
 		usb->bus, usb->address, sdi->connection_id, USB_INTERFACE);
@@ -327,7 +327,6 @@ static int dev_close(struct sr_dev_inst *sdi)
 	libusb_reset_device(usb->devhdl);
 	libusb_close(usb->devhdl);
 	usb->devhdl = NULL;
-	sdi->status = SR_ST_INACTIVE;
 
 	return SR_OK;
 }
diff --git a/src/std.c b/src/std.c
index 35da7088..13f9b031 100644
--- a/src/std.c
+++ b/src/std.c
@@ -174,27 +174,20 @@ SR_PRIV int std_serial_dev_open(struct sr_dev_inst *sdi)
  * This function can be used to implement the dev_close() driver API
  * callback in drivers that use a serial port.
  *
- * After closing the port, the status field of the given sdi is set
- * to SR_ST_INACTIVE.
- *
  * @retval SR_OK Success.
  * @retval SR_ERR_ARG Invalid arguments.
+ * @retval SR_ERR Serial port close failed.
  */
 SR_PRIV int std_serial_dev_close(struct sr_dev_inst *sdi)
 {
 	struct sr_serial_dev_inst *serial;
 
-	sdi->status = SR_ST_INACTIVE;
-
-	serial = sdi->conn;
-	if (!serial) {
-		sr_err("%s: Can't close invalid serial port.", sdi->driver->name);
+	if (!sdi || !sdi->conn)
 		return SR_ERR_ARG;
-	}
 
-	serial_close(serial);
+	serial = sdi->conn;
 
-	return SR_OK;
+	return serial_close(serial);
 }
 
 /**