Hi Add information. My develop environment is on x86. According to following report, http://kisskb.ellerman.id.au/kisskb/buildresult/5771890/ http://kisskb.ellerman.id.au/kisskb/buildresult/5771905/ This occurred on sparc64. I suspect this issue ins GPIO implementation for sparc64. Does sparc64 support GPIO interrupt ? (Even x86, before 2.6.39, GPIO interrupt is not implemented !) Additionally, this driver is for companion chip of Intel Atom E6xx series. So, this driver is never used for except x86, e.g. sparc. thanks -- ROHM Co., Ltd. tomoya -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html