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diff -ur libusb-1.0.0/libusb/os/linux_usbfs.c libusb-1.0.0-mod/libusb/os/linux_usbfs.c
--- libusb-1.0.0/libusb/os/linux_usbfs.c 2008-12-13 20:43:20.000000000 +0100
+++ libusb-1.0.0-mod/libusb/os/linux_usbfs.c 2009-04-30 04:25:12.000000000 +0200
@@ -1295,7 +1295,8 @@
urb->buffer_length = transfer->length % MAX_BULK_BUFFER_LENGTH;
else
urb->buffer_length = MAX_BULK_BUFFER_LENGTH;
-
+ if ((!(transfer->endpoint & LIBUSB_ENDPOINT_DIR_MASK)) && (i == num_urbs - 1))
+ urb->flags = USBFS_URB_ZLP;
r = ioctl(dpriv->fd, IOCTL_USBFS_SUBMITURB, urb);
if (r < 0) {
int j;
diff -ur libusb-1.0.0/libusb/os/linux_usbfs.h libusb-1.0.0-mod/libusb/os/linux_usbfs.h
--- libusb-1.0.0/libusb/os/linux_usbfs.h 2008-07-16 16:17:57.000000000 +0200
+++ libusb-1.0.0-mod/libusb/os/linux_usbfs.h 2009-04-30 04:08:27.000000000 +0200
@@ -63,6 +63,7 @@
#define USBFS_URB_DISABLE_SPD 1
#define USBFS_URB_ISO_ASAP 2
#define USBFS_URB_QUEUE_BULK 0x10
+#define USBFS_URB_ZLP 0x40
enum usbfs_urb_type {
USBFS_URB_TYPE_ISO = 0,
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