Core: Don't wait for completion if cancel_transfer failed

* See http://libusbx.1081486.n5.nabble.com/Libusbx-devel-libusb-interrupt-transfer-does-not-return-in-case-of-error-td626.html
* Closes #76

diff --git a/AUTHORS b/AUTHORS
index cb0511a..88c7ab5 100644 (file)
--- a/AUTHORS
+++ b/AUTHORS
@@ -48,4 +48,5 @@ Uri Lublin
 Vasily Khoruzhick
 Vitali Lovich
 Xiaofan Chen
+Zoltán Kovács
 Роман Донченко

diff --git a/libusb/sync.c b/libusb/sync.c
index 5033387..b9a72e4 100644 (file)
--- a/libusb/sync.c
+++ b/libusb/sync.c
@@ -106,10 +106,11 @@ int API_EXPORTED libusb_control_transfer(libusb_device_handle *dev_handle,
                if (r < 0) {
                        if (r == LIBUSB_ERROR_INTERRUPTED)
                                continue;
-                       libusb_cancel_transfer(transfer);
-                       while (!completed)
-                               if (libusb_handle_events_completed(HANDLE_CTX(dev_handle), &completed) < 0)
-                                       break;
+                       if (libusb_cancel_transfer(transfer) == LIBUSB_SUCCESS) {
+                               while (!completed)
+                                       if (libusb_handle_events_completed(HANDLE_CTX(dev_handle), &completed) < 0)
+                                               break;
+                       }
                        libusb_free_transfer(transfer);
                        return r;
                }
@@ -183,10 +184,11 @@ static int do_sync_bulk_transfer(struct libusb_device_handle *dev_handle,
                if (r < 0) {
                        if (r == LIBUSB_ERROR_INTERRUPTED)
                                continue;
-                       libusb_cancel_transfer(transfer);
-                       while (!completed)
-                               if (libusb_handle_events_completed(HANDLE_CTX(dev_handle), &completed) < 0)
-                                       break;
+                       if (libusb_cancel_transfer(transfer) == LIBUSB_SUCCESS) {
+                               while (!completed)
+                                       if (libusb_handle_events_completed(HANDLE_CTX(dev_handle), &completed) < 0)
+                                               break;
+                       }
                        libusb_free_transfer(transfer);
                        return r;
                }

diff --git a/libusb/version_nano.h b/libusb/version_nano.h
index 7e52a56..7f14aa2 100644 (file)
--- a/libusb/version_nano.h
+++ b/libusb/version_nano.h
@@ -1 +1 @@
-#define LIBUSB_NANO 10598
+#define LIBUSB_NANO 10599