> +/*
> + * Macro to determine the size of SCSI command. This macro takes vendor
> + * unique commands into account. SCSI commands in groups 6 and 7 are
> + * vendor unique and we will depend upon the command length being
> + * supplied correctly in cmd_len.
> + */
> +#define CDB_SIZE(cmd) (((((cmd)->cmnd[0] >> 5) & 7) < 6) ? \
> + COMMAND_SIZE((cmd)->cmnd[0]) : (cmd)->cmd_len)
should probably go to scsi.h as it's generally usefull.
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