The file drivers/usb/musb/musb_core.c contains the code: static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store); Is it correct to have NULL in the third argument for an attribute that can be read? Should the permission be 0444 instead? thanks, julia -- 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