[Libusb-devel] usb_bulk_read() error doesn't set usb_strerror()

[Joe C. <ma...@jo...>]

I'm using libusb 0.1.8 on CentOS 4.2, so maybe this is fixed already, 
but with the following code snippet:

8<-----------------------------
   ret = usb_bulk_read(udev, 0x86, Buffer, BufferSize, REQUEST_TIMEOUT);
   if (ret < 0)
   {
     write_camera_log(WC_ERROR, "usb_bulk_read error %d\n", ret);
     write_camera_log(WC_ERROR, "usb_error_type %d\n", usb_error_type);
     write_camera_log(WC_ERROR, "errors: %s\n", usb_strerror());
8<-----------------------------

I get the following output from my usb device occasionally:

8<-----------------------------
usb_bulk_read error -110
usb_error_type 0
errors: No error
8<-----------------------------

I was looking through the libusb 0.1.8 source, and for the life of me I 
just can't see how usb_error_type could not get set (nor how 
usb_strerror() could return "No error") when usb_bulk_read() returns a -110.

Am I doing something obviously wrong here (I know I haven't given much 
detail -- I can provide more if needed)?

Also, I take it that a return value of -110 means the error is ETIMEDOUT 
-- is that correct?

Thanks,

Joe