Hi Jon, I looked through the cafe_ccic.c source code and as far as I can tell the s_mutex lock is used in all the right places. Unless you have any objections I'd like to replace .ioctl by .unlocked_ioctl in this driver. Regards, Hans -- Hans Verkuil - video4linux developer - sponsored by Cisco -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html