-/**
- * sg_scsi_ioctl -- handle deprecated SCSI_IOCTL_SEND_COMMAND ioctl
- * @file: file this ioctl operates on (optional)
- * @q: request queue to send scsi commands down
- * @disk: gendisk to operate on (option)
- * @sic: userspace structure describing the command to perform
- *
- * Send down the scsi command described by @sic to the device below
- * the request queue @q. If @file is non-NULL it's used to perform
- * fine-grained permission checks that allow users to send down
- * non-destructive SCSI commands. If the caller has a struct gendisk
- * available it should be passed in as @disk to allow the low level
- * driver to use the information contained in it. A non-NULL @disk
- * is only allowed if the caller knows that the low level driver doesn't
- * need it (e.g. in the scsi subsystem).
- *
- * Notes:
- * - This interface is deprecated - users should use the SG_IO
- * interface instead, as this is a more flexible approach to
- * performing SCSI commands on a device.
- * - The SCSI command length is determined by examining the 1st byte
- * of the given command. There is no way to override this.
- * - Data transfers are limited to PAGE_SIZE
- * - The length (x + y) must be at least OMAX_SB_LEN bytes long to
- * accommodate the sense buffer when an error occurs.
- * The sense buffer is truncated to OMAX_SB_LEN (16) bytes so that
- * old code will not be surprised.
- * - If a Unix error occurs (e.g. ENOMEM) then the user will receive
- * a negative return and the Unix error code in 'errno'.
- * If the SCSI command succeeds then 0 is returned.
- * Positive numbers returned are the compacted SCSI error codes (4
- * bytes in one int) where the lowest byte is the SCSI status.
- */