MFC r301842:

Implement code to stop all USB endpoints before executing a USB device
reset command, alternate setting command or set configuration
command. Else LibUSB v1.0 will not re-open the endpoints which the
kernel closes and the USB application might wait infinitely for
transfers to complete.

1 files changed, 14 insertions, 2 deletions

diff --git a/lib/libusb/libusb10.c b/lib/libusb/libusb10.c
index 856eafa1aeb9..7979f9bb7336 100644
--- a/lib/libusb/libusb10.c
+++ b/lib/libusb/libusb10.c
@@ -45,6 +45,8 @@
 #include "libusb.h"
 #include "libusb10.h"
 
+#define	LIBUSB_NUM_SW_ENDPOINTS	(16 * 4)
+
 static pthread_mutex_t default_context_lock = PTHREAD_MUTEX_INITIALIZER;
 struct libusb_context *usbi_default_context = NULL;
 
@@ -423,7 +425,7 @@ libusb_open(libusb_device *dev, libusb_device_handle **devh)
 	if (dev == NULL)
 		return (LIBUSB_ERROR_INVALID_PARAM);
 
-	err = libusb20_dev_open(pdev, 16 * 4 /* number of endpoints */ );
+	err = libusb20_dev_open(pdev, LIBUSB_NUM_SW_ENDPOINTS);
 	if (err) {
 		libusb_unref_device(dev);
 		return (LIBUSB_ERROR_NO_MEM);
@@ -1476,7 +1478,17 @@ libusb_cancel_transfer(struct libusb_transfer *uxfer)
 UNEXPORTED void
 libusb10_cancel_all_transfer(libusb_device *dev)
 {
-	/* TODO */
+	struct libusb20_device *pdev = dev->os_priv;
+	unsigned x;
+
+	for (x = 0; x != LIBUSB_NUM_SW_ENDPOINTS; x++) {
+		struct libusb20_transfer *xfer;
+
+		xfer = libusb20_tr_get_pointer(pdev, x);
+		if (xfer == NULL)
+			continue;
+		libusb20_tr_close(xfer);
+	}
 }
 
 uint16_t