/lib/firmware/carl9170fw/extra/libusb-zeropacket.diff is in linux-firmware 1.157.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | diff -Nurp libusb-1.0-1.0.2/libusb/libusb.h libusb-1.0-1.0.2-orig/libusb/libusb.h
--- libusb-1.0-1.0.2/libusb/libusb.h 2009-06-07 23:18:19.000000000 +0200
+++ libusb-1.0-1.0.2-orig/libusb/libusb.h 2009-08-10 22:07:41.000000000 +0200
@@ -673,6 +673,9 @@ enum libusb_transfer_flags {
* from your transfer callback, as this will result in a double-free
* when this flag is acted upon. */
LIBUSB_TRANSFER_FREE_TRANSFER = 1<<2,
+
+ /** Send an extra termination packet, when needed */
+ LIBUSB_TRANSFER_ZERO_PACKET = 1<<3,
};
/** \ingroup asyncio
diff -Nurp libusb-1.0-1.0.2/libusb/os/linux_usbfs.c libusb-1.0-1.0.2-orig/libusb/os/linux_usbfs.c
--- libusb-1.0-1.0.2/libusb/os/linux_usbfs.c 2009-06-10 22:41:26.000000000 +0200
+++ libusb-1.0-1.0.2-orig/libusb/os/linux_usbfs.c 2009-08-10 22:10:14.000000000 +0200
@@ -1298,6 +1298,8 @@ static int submit_bulk_transfer(struct u
urb->type = urb_type;
urb->endpoint = transfer->endpoint;
urb->buffer = transfer->buffer + (i * MAX_BULK_BUFFER_LENGTH);
+ if (transfer->flags & LIBUSB_TRANSFER_ZERO_PACKET)
+ urb->flags = USBFS_URB_ZERO_PACKET;
if (i == num_urbs - 1 && last_urb_partial)
urb->buffer_length = transfer->length % MAX_BULK_BUFFER_LENGTH;
else
diff -Nurp libusb-1.0-1.0.2/libusb/os/linux_usbfs.h libusb-1.0-1.0.2-orig/libusb/os/linux_usbfs.h
--- libusb-1.0-1.0.2/libusb/os/linux_usbfs.h 2008-07-16 16:17:57.000000000 +0200
+++ libusb-1.0-1.0.2-orig/libusb/os/linux_usbfs.h 2009-08-10 22:13:15.000000000 +0200
@@ -63,6 +63,9 @@ struct usbfs_getdriver {
#define USBFS_URB_DISABLE_SPD 1
#define USBFS_URB_ISO_ASAP 2
#define USBFS_URB_QUEUE_BULK 0x10
+#define USBFS_URB_NO_FSBR 0x20
+#define USBFS_URB_ZERO_PACKET 0x40
+#define USBFS_URB_NO_INTERRUPT 0x80
enum usbfs_urb_type {
USBFS_URB_TYPE_ISO = 0,
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