691 		if (STp->block_size == 0)  in write_behind_check()
694 			STps->drv_block += STbuffer->writing / STp->block_size;  in write_behind_check()
782 		blks = transfer / STp->block_size;  in st_flush_write_buffer()
846 	if (STp->block_size == 0)  in flush_buffer()
850 		     (STp->buffer)->read_pointer) / STp->block_size -  in flush_buffer()
851 	    ((STp->buffer)->read_pointer + STp->block_size - 1) /  in flush_buffer()
852 	    STp->block_size;  in flush_buffer()
895 	    STm->default_blksize != STp->block_size) {  in set_mode_densblk()
899 		arg |= STp->block_size;  in set_mode_densblk()
1095 			STp->block_size = 0;  in check_tape()
1146 		STp->block_size = ST_DEFAULT_BLOCK;	/* Educated guess (?) */  in check_tape()
1160 			STp->block_size = (STp->buffer)->b_data[9] * 65536 +  in check_tape()
1182 	if (STp->block_size > 0)  in check_tape()
1184 			(STp->buffer)->buffer_size / STp->block_size;  in check_tape()
1190 		    STp->block_size, (STp->buffer)->buffer_size,  in check_tape()
1525 	if (STp->block_size == 0 && STp->max_block > 0 &&  in rw_checks()
1573 		if (STp->block_size)  in setup_buffering()
1574 			bufsize = STp->block_size > st_fixed_buffer_size ?  in setup_buffering()
1575 				STp->block_size : st_fixed_buffer_size;  in setup_buffering()
1592 		if (STp->block_size)  in setup_buffering()
1593 			STbp->buffer_blocks = bufsize / STp->block_size;  in setup_buffering()
1640 	if (STp->block_size != 0 && (count % STp->block_size) != 0) {  in st_write()
1699 	if (STp->block_size != 0 &&  in st_write()
1715 	cmd[1] = (STp->block_size != 0);  in st_write()
1726 			if (STp->block_size == 0)  in st_write()
1729 				do_count = STbp->buffer_blocks * STp->block_size -  in st_write()
1744 		async_write = STp->block_size == 0 && !STbp->do_dio &&  in st_write()
1747 		if (STp->block_size != 0 && STm->do_buffer_writes &&  in st_write()
1757 		if (STp->block_size == 0)  in st_write()
1764 			blks /= STp->block_size;  in st_write()
1765 			transfer = blks * STp->block_size;  in st_write()
1795 				else if (STp->block_size == 0 &&  in st_write()
1800 				if (STp->block_size != 0)  in st_write()
1801 					undone *= STp->block_size;  in st_write()
1807 					if (STp->block_size)  in st_write()
1808 						blks = (transfer - undone) / STp->block_size;  in st_write()
1814 					if (STp->block_size == 0 ||  in st_write()
1829 								STp->block_size;  in st_write()
1859 			if (STp->block_size == 0)  in st_write()
1916 	if (STp->block_size == 0)  in read_tape()
1921 			bytes = blks * STp->block_size;  in read_tape()
1926 			blks = bytes / STp->block_size;  in read_tape()
1927 			bytes = blks * STp->block_size;  in read_tape()
1933 	cmd[1] = (STp->block_size != 0);  in read_tape()
1975 					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()
3750 		    ((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) |  in st_ioctl()
3754 		if (STp->block_size != 0) {  in st_ioctl()
3757 				    (STp->buffer)->buffer_bytes / STp->block_size;  in st_ioctl()
3761                                          STp->block_size - 1) / STp->block_size;  in st_ioctl()
3792                     (STm->do_buffer_writes && STp->block_size != 0) ||  in st_ioctl()