Hello, On Tue, Feb 28, 2017 at 03:33:48PM +0100, Dmitry Vyukov wrote: > If the WARNING is merely to inform user about invalid protocol, please > issue a single line pr_err without the stack trace (invalid protocol > value may be more interesting). Yeah, the warning is harmless. The code was written before passthrough support and just assumed that nobody higher up in the stack should be issuing unsupported protocols and warned on such cases as a precaution. I'm just gonna drop the WARN. The error code to sg command should be enough to indicate the failure. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html