thodg/cgminer

diff --git a/cgminer.c b/cgminer.c
index 20c2b06..0e70007 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -1366,6 +1366,20 @@ static char *opt_verusage_and_exit(const char *extra)
 	exit(0);
 }
 
+#if defined(HAVE_OPENCL) || defined(USE_USBUTILS)
+char *display_devs(int *ndevs)
+{
+	*ndevs = 0;
+#ifdef HAVE_OPENCL
+	print_ndevs(ndevs);
+#endif
+#ifdef USE_USBUTILS
+	usb_all(0);
+#endif
+	exit(*ndevs);
+}
+#endif
+
 /* These options are available from commandline only */
 static struct opt_table opt_cmdline_table[] = {
 	OPT_WITH_ARG("--config|-c",
@@ -1379,10 +1393,17 @@ static struct opt_table opt_cmdline_table[] = {
 	OPT_WITHOUT_ARG("--help|-h",
 			opt_verusage_and_exit, NULL,
 			"Print this message"),
-#ifdef HAVE_OPENCL
+#if defined(HAVE_OPENCL) || defined(USE_USBUTILS)
 	OPT_WITHOUT_ARG("--ndevs|-n",
-			print_ndevs_and_exit, &nDevs,
-			"Display number of detected GPUs, OpenCL platform information, and exit"),
+			display_devs, &nDevs,
+			"Display "
+#ifdef HAVE_OPENCL
+			"number of detected GPUs, OpenCL platform information, "
+#endif
+#ifdef USE_USBUTILS
+			"all USB devices, "
+#endif
+			"and exit"),
 #endif
 	OPT_WITHOUT_ARG("--version|-V",
 			opt_version_and_exit, packagename,
diff --git a/driver-opencl.c b/driver-opencl.c
index 8580b22..5b83349 100644
--- a/driver-opencl.c
+++ b/driver-opencl.c
@@ -592,13 +592,12 @@ char *set_intensity(char *arg)
 	return NULL;
 }
 
-char *print_ndevs_and_exit(int *ndevs)
+void print_ndevs(int *ndevs)
 {
 	opt_log_output = true;
 	opencl_drv.drv_detect();
 	clear_adl(*ndevs);
 	applog(LOG_INFO, "%i GPU devices max detected", *ndevs);
-	exit(*ndevs);
 }
 #endif
 
diff --git a/driver-opencl.h b/driver-opencl.h
index 22bd9ec..1cb8807 100644
--- a/driver-opencl.h
+++ b/driver-opencl.h
@@ -4,7 +4,7 @@
 #include "miner.h"
 
 
-extern char *print_ndevs_and_exit(int *ndevs);
+extern void print_ndevs(int *ndevs);
 extern void *reinit_gpu(void *userdata);
 extern char *set_gpu_map(char *arg);
 extern char *set_gpu_engine(char *arg);
diff --git a/usbutils.c b/usbutils.c
index 93d918c..e7567ef 100644
--- a/usbutils.c
+++ b/usbutils.c
@@ -411,7 +411,7 @@ static bool setgetdes(ssize_t count, libusb_device *dev, struct libusb_device_ha
 	return true;
 }
 
-static void usb_full(ssize_t count, libusb_device *dev, char **buf, size_t *off, size_t *len)
+static void usb_full(ssize_t count, libusb_device *dev, char **buf, size_t *off, size_t *len, int level)
 {
 	struct libusb_device_descriptor desc;
 	uint8_t bus_number;
@@ -437,7 +437,7 @@ static void usb_full(ssize_t count, libusb_device *dev, char **buf, size_t *off,
 	bus_number = libusb_get_bus_number(dev);
 	device_address = libusb_get_device_address(dev);
 
-	if (opt_usbdump == 0) {
+	if (level == 0) {
 		sprintf(tmp, EOL ".USB dev %d: Bus %d Device %d ID: %04x:%04x",
 				(int)count, (int)bus_number, (int)device_address,
 				desc.idVendor, desc.idProduct);
@@ -471,7 +471,7 @@ static void usb_full(ssize_t count, libusb_device *dev, char **buf, size_t *off,
 	if (err < 0)
 		sprintf((char *)prod, "** err(%d)", err);
 
-	if (opt_usbdump == 0) {
+	if (level == 0) {
 		libusb_close(handle);
 		sprintf(tmp, EOL "  Manufacturer: '%s'" EOL "  Product: '%s'", man, prod);
 		append(buf, tmp, off, len);
@@ -556,7 +556,7 @@ static void usb_full(ssize_t count, libusb_device *dev, char **buf, size_t *off,
 }
 
 // Function to dump all USB devices
-static void usb_all()
+void usb_all(int level)
 {
 	libusb_device **list;
 	ssize_t count, i;
@@ -581,7 +581,7 @@ static void usb_all()
 		off = strlen(buf);
 
 		for (i = 0; i < count; i++)
-			usb_full(i, list[i], &buf, &off, &len);
+			usb_full(i, list[i], &buf, &off, &len, level);
 
 		applog(LOG_WARNING, "%s", buf);
 
@@ -599,7 +599,7 @@ static void cgusb_check_init()
 		// N.B. environment LIBUSB_DEBUG also sets libusb_set_debug()
 		if (opt_usbdump >= 0) {
 			libusb_set_debug(NULL, opt_usbdump);
-			usb_all();
+			usb_all(opt_usbdump);
 		}
 
 		usb_commands = malloc(sizeof(*usb_commands) * C_MAX);
diff --git a/usbutils.h b/usbutils.h
index 8a364c9..de79312 100644
--- a/usbutils.h
+++ b/usbutils.h
@@ -129,6 +129,7 @@ enum usb_cmds {
 struct device_drv;
 struct cgpu_info;
 
+void usb_all(int level);
 void usb_uninit(struct cgpu_info *cgpu);
 bool usb_init(struct cgpu_info *cgpu, struct libusb_device *dev, struct usb_find_devices *found);
 void usb_detect(struct device_drv *drv, bool (*device_detect)(struct libusb_device *, struct usb_find_devices *));