In this bug report, lsusb shows an HID device which has bInterval set to 0
in its two Interrupt endpoint descriptors:
http://bugzilla.kernel.org/show_bug.cgi?id=8432
Of course this confuses the USB drivers, causing a lot of problems.
What should we do about such things? And where should we do it? By the
time fill_interrupt_urb() has been called it's already too late, since the
code does
urb->interval = 1 << (bInterval - 1);
which is undefined when bInterval is 0.
Possibilities:
Unilaterally change the 0 to something reasonable -- but what?
Declare the descriptor illegal and log a warning message.
Any other suggestions?
Alan Stern
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