I haven't been able to understand why the transfers fail under Linux whereas it works fine under Windows (note that I am using the same Windows driver in Linux, albeit with ndiswrapper). All URBs exchanged until the failed URB seem to be identical. The URB that fails is 2400 bytes long bulk IN URB. I am wondering if the timeout is due to large(?) buffer, considering it is running as full speed device and not high speed device (see earlier post about initialization issues). That is, if Windows driver asks to read 2400 bytes, would it help to split it as two URB requests, each of length 1200 bytes and when second URB is completed, copy both buffers back into Windows driver's buffer. This makes ndiswrapper more complicated, especially with error processing, but I will try at least as a first cut to see if this helps. Please let me know if you have any suggestions/ideas to fix this issue.
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