sr: cleanup callback: Return int.

hardware/alsa/alsa.c

@@ -150,15 +150,19 @@ static int hw_closedev(int device_index)
 	return SR_OK;
 }
 
-static void hw_cleanup(void)
+static int hw_cleanup(void)
 {
 	struct sr_device_instance *sdi;
 
-	if (!(sdi = sr_get_device_instance(device_instances, 0)))
-		return;
+	if (!(sdi = sr_get_device_instance(device_instances, 0))) {
+		sr_err("alsa: %s: sdi was NULL", __func__);
+		return SR_ERR_BUG;
+	}
 
 	g_free(sdi->priv);
 	sr_device_instance_free(sdi);
+
+	return SR_OK;
 }
 
 static void *hw_get_device_info(int device_index, int device_info_id)

hardware/asix-sigma/asix-sigma.c

@@ -721,20 +721,27 @@ static int hw_closedev(int device_index)
 	return SR_OK;
 }
 
-static void hw_cleanup(void)
+static int hw_cleanup(void)
 {
 	GSList *l;
 	struct sr_device_instance *sdi;
+	int ret = SR_OK;
 
 	/* Properly close all devices. */
 	for (l = device_instances; l; l = l->next) {
-		sdi = l->data;
-		if (sdi->priv != NULL)
-			g_free(sdi->priv);
+		if (!(sdi = l->data)) {
+			/* Log error, but continue cleaning up the rest. */
+			sr_err("asix: %s: sdi was NULL, continuing", __func__);
+			ret = SR_ERR_BUG;
+			continue;
+		}
+		g_free(sdi->priv);
 		sr_device_instance_free(sdi);
 	}
 	g_slist_free(device_instances);
 	device_instances = NULL;
+
+	return ret;
 }
 
 static void *hw_get_device_info(int device_index, int device_info_id)

hardware/chronovu-la8/chronovu-la8.c

@@ -679,17 +679,20 @@ static int hw_closedev(int device_index)
 	return SR_OK;
 }
 
-static void hw_cleanup(void)
+static int hw_cleanup(void)
 {
 	GSList *l;
 	struct sr_device_instance *sdi;
+	int ret = SR_OK;
 
 	sr_spew("la8: entering %s", __func__);
 
 	/* Properly close all devices. */
 	for (l = device_instances; l; l = l->next) {
-		if ((sdi = l->data) == NULL) {
+		if (!(sdi = l->data)) {
+			/* Log error, but continue cleaning up the rest. */
 			sr_err("la8: %s: sdi was NULL, continuing", __func__);
+			ret = SR_ERR_BUG;
 			continue;
 		}
 #if 0
@@ -707,6 +710,8 @@ static void hw_cleanup(void)
 	}
 	g_slist_free(device_instances); /* Returns void. */
 	device_instances = NULL;
+
+	return ret;
 }
 
 static void *hw_get_device_info(int device_index, int device_info_id)

hardware/demo/demo.c

@@ -174,9 +174,10 @@ static int hw_closedev(int device_index)
 	return SR_OK;
 }
 
-static void hw_cleanup(void)
+static int hw_cleanup(void)
 {
 	/* Nothing needed so far. */
+	return SR_OK;
 }
 
 static void *hw_get_device_info(int device_index, int device_info_id)

hardware/link-mso19/link-mso19.c

@@ -518,25 +518,30 @@ ret:
 	return devcnt;
 }
 
-static void hw_cleanup(void)
+static int hw_cleanup(void)
 {
 	GSList *l;
 	struct sr_device_instance *sdi;
+	int ret = SR_OK;
 
 	/* Properly close all devices. */
 	for (l = device_instances; l; l = l->next) {
-		sdi = l->data;
+		if (!(sdi = l->data)) {
+			/* Log error, but continue cleaning up the rest. */
+			sr_err("mso19: %s: sdi was NULL, continuing", __func__);
+			ret = SR_ERR_BUG;
+			continue;
+		}
 		if (sdi->serial->fd != -1)
 			serial_close(sdi->serial->fd);
-		if (sdi->priv != NULL)
-		{
-			g_free(sdi->priv);
-			sdi->priv = NULL;
-		}
+		g_free(sdi->priv);
+		sdi->priv = NULL;
 		sr_device_instance_free(sdi);
 	}
 	g_slist_free(device_instances);
 	device_instances = NULL;
+
+	return SR_OK;
 }
 
 static int hw_opendev(int device_index)

hardware/openbench-logic-sniffer/ols.c

@@ -521,16 +521,29 @@ static int hw_closedev(int device_index)
 	return SR_OK;
 }
 
-static void hw_cleanup(void)
+static int hw_cleanup(void)
 {
 	GSList *l;
 	struct sr_device_instance *sdi;
 	struct ols_device *ols;
+	int ret = SR_OK;
 
 	/* Properly close and free all devices. */
 	for (l = device_instances; l; l = l->next) {
-		sdi = l->data;
-		ols = sdi->priv;
+		if (!(sdi = l->data)) {
+			/* Log error, but continue cleaning up the rest. */
+			sr_err("ols: %s: sdi was NULL, continuing", __func__);
+			ret = SR_ERR_BUG;
+			continue;
+		}
+		if (!(ols = sdi->priv)) {
+			/* Log error, but continue cleaning up the rest. */
+			sr_err("ols: %s: sdi->priv was NULL, continuing",
+			       __func__);
+			ret = SR_ERR_BUG;
+			continue;
+		}
+		/* TODO: Check for serial != NULL. */
 		if (ols->serial->fd != -1)
 			serial_close(ols->serial->fd);
 		sr_serial_device_instance_free(ols->serial);
@@ -538,6 +551,8 @@ static void hw_cleanup(void)
 	}
 	g_slist_free(device_instances);
 	device_instances = NULL;
+
+	return ret;
 }
 
 static void *hw_get_device_info(int device_index, int device_info_id)

hardware/saleae-logic/saleae-logic.c

@@ -460,16 +460,28 @@ static int hw_closedev(int device_index)
 	return SR_OK;
 }
 
-static void hw_cleanup(void)
+static int hw_cleanup(void)
 {
 	GSList *l;
 	struct sr_device_instance *sdi;
 	struct fx2_device *fx2;
+	int ret = SR_OK;
 
 	/* Properly close and free all devices. */
 	for (l = device_instances; l; l = l->next) {
-		sdi = l->data;
-		fx2 = sdi->priv;
+		if (!(sdi = l->data)) {
+			/* Log error, but continue cleaning up the rest. */
+			sr_err("fx2: %s: sdi was NULL, continuing", __func__);
+			ret = SR_ERR_BUG;
+			continue;
+		}
+		if (!(fx2 = sdi->priv)) {
+			/* Log error, but continue cleaning up the rest. */
+			sr_err("fx2: %s: sdi->priv was NULL, continuing",
+			       __func__);
+			ret = SR_ERR_BUG;
+			continue;
+		}
 		close_device(sdi);
 		sr_usb_device_instance_free(fx2->usb);
 		sr_device_instance_free(sdi);
@@ -481,6 +493,8 @@ static void hw_cleanup(void)
 	if (usb_context)
 		libusb_exit(usb_context);
 	usb_context = NULL;
+
+	return ret;
 }
 
 static void *hw_get_device_info(int device_index, int device_info_id)

hardware/zeroplus-logic-cube/zeroplus.c

@@ -485,10 +485,12 @@ static int hw_closedev(int device_index)
 	return SR_OK;
 }
 
-static void hw_cleanup(void)
+static int hw_cleanup(void)
 {
 	GSList *l;
 
+	/* TODO: Error handling. */
+
 	/* Properly close all devices... */
 	for (l = device_instances; l; l = l->next)
 		close_device((struct sr_device_instance *)l->data);
@@ -502,6 +504,8 @@ static void hw_cleanup(void)
 	if (usb_context)
 		libusb_exit(usb_context);
 	usb_context = NULL;
+
+	return SR_OK;
 }
 
 static void *hw_get_device_info(int device_index, int device_info_id)

session_driver.c

@@ -138,7 +138,7 @@ static int feed_chunk(int fd, int revents, void *session_data)
 }
 
 /* driver callbacks */
-static void hw_cleanup(void);
+static int hw_cleanup(void);
 
 /**
  * TODO.
@@ -149,7 +149,6 @@ static void hw_cleanup(void);
  */
 static int hw_init(const char *deviceinfo)
 {
-
 	sessionfile = g_strdup(deviceinfo);
 
 	return 0;
@@ -159,10 +158,12 @@ static int hw_init(const char *deviceinfo)
  * TODO.
  *
  */
-static void hw_cleanup(void)
+static int hw_cleanup(void)
 {
 	GSList *l;
 
+	/* TODO: Error handling. */
+
 	for (l = device_instances; l; l = l->next)
 		sr_device_instance_free(l->data);
 
@@ -172,6 +173,8 @@ static void hw_cleanup(void)
 	sr_session_source_remove(-1);
 
 	g_free(sessionfile);
+
+	return SR_OK;
 }
 
 static int hw_opendev(int device_index)

sigrok.h

@@ -344,7 +344,7 @@ struct sr_device_plugin {
 	char *longname;
 	int api_version;
 	int (*init) (const char *deviceinfo);
-	void (*cleanup) (void);
+	int (*cleanup) (void);
 
 	/* Device-specific */
 	int (*opendev) (int device_index);