> Ok, here comes the first step. Can you be more specific > about what you mean with the open and release methods? > Do you mean the sg.c and bsg.c chrdev file operations? No, the open and release methods in struct block_device_operations. After this the driver API for block devices is BKL free, which is an important step. To get there the locking in blkdev_get/put needs to be sorted out first, though. The ioctl pushdown patch looks good to me, btw. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html