690 		if (STp->block_size == 0)  in write_behind_check()
693 			STps->drv_block += STbuffer->writing / STp->block_size;  in write_behind_check()
781 		blks = transfer / STp->block_size;  in st_flush_write_buffer()
848 	if (STp->block_size == 0)  in flush_buffer()
852 		     (STp->buffer)->read_pointer) / STp->block_size -  in flush_buffer()
853 	    ((STp->buffer)->read_pointer + STp->block_size - 1) /  in flush_buffer()
854 	    STp->block_size;  in flush_buffer()
897 	    STm->default_blksize != STp->block_size) {  in set_mode_densblk()
901 		arg |= STp->block_size;  in set_mode_densblk()
1097 			STp->block_size = 0;  in check_tape()
1148 		STp->block_size = ST_DEFAULT_BLOCK;	/* Educated guess (?) */  in check_tape()
1162 			STp->block_size = (STp->buffer)->b_data[9] * 65536 +  in check_tape()
1184 	if (STp->block_size > 0)  in check_tape()
1186 			(STp->buffer)->buffer_size / STp->block_size;  in check_tape()
1192 		    STp->block_size, (STp->buffer)->buffer_size,  in check_tape()
1528 	if (STp->block_size == 0 && STp->max_block > 0 &&  in rw_checks()
1576 		if (STp->block_size)  in setup_buffering()
1577 			bufsize = STp->block_size > st_fixed_buffer_size ?  in setup_buffering()
1578 				STp->block_size : st_fixed_buffer_size;  in setup_buffering()
1595 		if (STp->block_size)  in setup_buffering()
1596 			STbp->buffer_blocks = bufsize / STp->block_size;  in setup_buffering()
1643 	if (STp->block_size != 0 && (count % STp->block_size) != 0) {  in st_write()
1702 	if (STp->block_size != 0 &&  in st_write()
1718 	cmd[1] = (STp->block_size != 0);  in st_write()
1729 			if (STp->block_size == 0)  in st_write()
1732 				do_count = STbp->buffer_blocks * STp->block_size -  in st_write()
1747 		async_write = STp->block_size == 0 && !STbp->do_dio &&  in st_write()
1750 		if (STp->block_size != 0 && STm->do_buffer_writes &&  in st_write()
1760 		if (STp->block_size == 0)  in st_write()
1767 			blks /= STp->block_size;  in st_write()
1768 			transfer = blks * STp->block_size;  in st_write()
1798 				else if (STp->block_size == 0 &&  in st_write()
1803 				if (STp->block_size != 0)  in st_write()
1804 					undone *= STp->block_size;  in st_write()
1810 					if (STp->block_size)  in st_write()
1811 						blks = (transfer - undone) / STp->block_size;  in st_write()
1817 					if (STp->block_size == 0 ||  in st_write()
1832 								STp->block_size;  in st_write()
1862 			if (STp->block_size == 0)  in st_write()
1919 	if (STp->block_size == 0)  in read_tape()
1924 			bytes = blks * STp->block_size;  in read_tape()
1929 			blks = bytes / STp->block_size;  in read_tape()
1930 			bytes = blks * STp->block_size;  in read_tape()
1936 	cmd[1] = (STp->block_size != 0);  in read_tape()
1977 				if (STp->block_size == 0 &&  in read_tape()
1982 					if (STp->block_size == 0 &&  in read_tape()
1994 					} else if (STp->block_size == 0) {  in read_tape()
2010 						    STp->block_size;  in read_tape()
2026 					if (STp->block_size == 0)  in read_tape()
2030 						    bytes - transfer * STp->block_size;  in read_tape()
2039 					if (STp->block_size == 0)  in read_tape()
2043 						    bytes - transfer * STp->block_size;  in read_tape()
2081 		if (STp->block_size == 0)  in read_tape()
2084 			STps->drv_block += STbp->buffer_bytes / STp->block_size;  in read_tape()
2112 	if (STp->block_size != 0 && (count % STp->block_size) != 0) {  in st_read()
2199 		if (STp->block_size == 0)  in st_read()
2929 			ltmp = STp->block_size;  in st_int_ioctl()
2975 			STp->block_size = arg & MT_ST_BLKSIZE_MASK;  in st_int_ioctl()
2976 			if (STp->block_size != 0) {  in st_int_ioctl()
2978 				    (STp->buffer)->buffer_size / STp->block_size;  in st_int_ioctl()
3650 		    ((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) |  in st_ioctl()
3654 		if (STp->block_size != 0) {  in st_ioctl()
3657 				    (STp->buffer)->buffer_bytes / STp->block_size;  in st_ioctl()
3661                                          STp->block_size - 1) / STp->block_size;  in st_ioctl()
3692                     (STm->do_buffer_writes && STp->block_size != 0) ||  in st_ioctl()