+From 6e31aa17271f90a443591719089688bbf2040765 Mon Sep 17 00:00:00 2001
+From: Kristof Robot <krirobo@gmail.com>
+Date: Sun, 8 Dec 2013 15:46:50 +0100
+Subject: [PATCH] kinect_upload_fw: fix setting configuration for some devices
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+X-Face: z*RaLf`X<@C75u6Ig9}{oW$H;1_\2t5)({*|jhM<pyWR#k60!#=#>/Vb;]yA5<GWI5`6u&+
+ ;6b'@y|8w"wB;4/e!7wYYrcqdJFY,~%Gk_4]cq$Ei/7<j&N3ah(m`ku?pX.&+~:_/wC~dwn^)MizBG
+ !pE^+iDQQ1yC6^,)YDKkxDd!T>\I~93>J<_`<4)A{':UrE
+
+On some Kinect devices where the desired configuration is already the
+currently active one libusb_set_configuration() fails in some way
+causing the subsequent bulk transfer to fail, and the program to exit,
+with this message:
+
+ libusbx: error [op_set_configuration] failed, error -1 errno 110
+ About to send: 09 20 02 06 01 00 00 00 60 00 00 00 00 00 00 00 15 00 00 00 00 00 00 00
+ libusbx: error [submit_bulk_transfer] submiturb failed error -1 errno=2
+ Error: res: -1 transferred: 0 (expected 24)
+
+Only set the desired configuration if it hasn't been set already.
+This prevents the problems from above.
+
+Do the configuration check as illustrated in
+http://libusbx.sourceforge.net/api-1.0/caveats.html that is by checking
+that the current configuration is still the desired one after claiming
+the device.
+---
+ kinect_upload_fw/kinect_upload_fw.c | 12 +++++++++++-
+ 1 file changed, 11 insertions(+), 1 deletion(-)
+
+diff --git a/kinect_upload_fw/kinect_upload_fw.c b/kinect_upload_fw/kinect_upload_fw.c
+index b2188d6..e3b72db 100644
+--- a/kinect_upload_fw/kinect_upload_fw.c
++++ b/kinect_upload_fw/kinect_upload_fw.c
+@@ -155,9 +155,19 @@ int main(int argc, char** argv) {
+ goto fail_libusb_open;
+ }
+
+- libusb_set_configuration(dev, 1);
++ int current_configuration = 0;
++ libusb_get_configuration(dev, ¤t_configuration);
++ if (current_configuration != 1)
++ libusb_set_configuration(dev, 1);
++
+ libusb_claim_interface(dev, 0);
+
++ libusb_get_configuration(dev, ¤t_configuration);
++ if (current_configuration != 1) {
++ res = -ENODEV;
++ goto cleanup;
++ }
++
+ seq = 1;
+
+ bootloader_command cmd;
+--
+1.8.5.1
+