This bug report:

        http://bugzilla.kernel.org/show_bug.cgi?id=8535

contains logs suggestive of problems with EHCI split-interrupt
handling.  See in particular comment #33; the usbmon log in comment #32
contains a line in which a low-speed interrupt URB returns with status
equal to 0 and actual_length set to -4.

Obviously this should never happen.  Can anybody offer tips on where to 
go searching through the driver code for a solution?

Alan Stern


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