From: Guenter Roeck <li...@roeck-us.net>
Date: Thu, 13 Oct 2016 16:43:16 -0700
> Check answers from USB stack and avoid re-sending the request
> multiple times if the device does not respond.
> This fixes the following problem, observed with a probably flaky adapter.
> Since the USB timeout is 5 seconds, and the operation is retried 30 times,
> this results in
> Signed-off-by: Guenter Roeck <li...@roeck-us.net>
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