thodg/cgminer

diff --git a/usbutils.c b/usbutils.c
index 232e19f..19d1854 100644
--- a/usbutils.c
+++ b/usbutils.c
@@ -2314,7 +2314,7 @@ static int usb_submit_transfer(struct usb_transfer *ut, struct libusb_transfer *
 		INIT_LIST_HEAD(&ut->ct.list);
 		list_add(&ct_list, &ut->ct.list);
 	} else
-		ut->cancellable = false;;
+		ut->cancellable = false;
 	cg_wunlock(&cgusb_fd_lock);
 
 	return err;
diff --git a/usbutils.h b/usbutils.h
index 98e3728..2750c09 100644
--- a/usbutils.h
+++ b/usbutils.h
@@ -394,6 +394,9 @@ void *usb_resource_thread(void *userdata);
 #define usb_read(cgpu, buf, bufsiz, read, cmd) \
 	_usb_read(cgpu, DEFAULT_INTINFO, DEFAULT_EP_IN, buf, bufsiz, read, DEVTIMEOUT, NULL, cmd, false, false)
 
+#define usb_read_cancellable(cgpu, buf, bufsiz, read, cmd) \
+	_usb_read(cgpu, DEFAULT_INTINFO, DEFAULT_EP_IN, buf, bufsiz, read, DEVTIMEOUT, NULL, cmd, false, true)
+
 #define usb_read_ii(cgpu, intinfo, buf, bufsiz, read, cmd) \
 	_usb_read(cgpu, intinfo, DEFAULT_EP_IN, buf, bufsiz, read, DEVTIMEOUT, NULL, cmd, false, false)
 
@@ -427,6 +430,9 @@ void *usb_resource_thread(void *userdata);
 #define usb_read_timeout(cgpu, buf, bufsiz, read, timeout, cmd) \
 	_usb_read(cgpu, DEFAULT_INTINFO, DEFAULT_EP_IN, buf, bufsiz, read, timeout, NULL, cmd, false, false)
 
+#define usb_read_timeout_cancellable(cgpu, buf, bufsiz, read, timeout, cmd) \
+	_usb_read(cgpu, DEFAULT_INTINFO, DEFAULT_EP_IN, buf, bufsiz, read, timeout, NULL, cmd, false, true)
+
 #define usb_read_ii_timeout(cgpu, intinfo, buf, bufsiz, read, timeout, cmd) \
 	_usb_read(cgpu, intinfo, DEFAULT_EP_IN, buf, bufsiz, read, timeout, NULL, cmd, false, false)