636 		if (STp->block_size == 0)  in write_behind_check()
639 			STps->drv_block += STbuffer->writing / STp->block_size;  in write_behind_check()
727 		blks = transfer / STp->block_size;  in st_flush_write_buffer()
794 	if (STp->block_size == 0)  in flush_buffer()
798 		     (STp->buffer)->read_pointer) / STp->block_size -  in flush_buffer()
799 	    ((STp->buffer)->read_pointer + STp->block_size - 1) /  in flush_buffer()
800 	    STp->block_size;  in flush_buffer()
843 	    STm->default_blksize != STp->block_size) {  in set_mode_densblk()
847 		arg |= STp->block_size;  in set_mode_densblk()
1043 			STp->block_size = 0;  in check_tape()
1094 		STp->block_size = ST_DEFAULT_BLOCK;	/* Educated guess (?) */  in check_tape()
1108 			STp->block_size = (STp->buffer)->b_data[9] * 65536 +  in check_tape()
1130 	if (STp->block_size > 0)  in check_tape()
1132 			(STp->buffer)->buffer_size / STp->block_size;  in check_tape()
1138 		    STp->block_size, (STp->buffer)->buffer_size,  in check_tape()
1474 	if (STp->block_size == 0 && STp->max_block > 0 &&  in rw_checks()
1522 		if (STp->block_size)  in setup_buffering()
1523 			bufsize = STp->block_size > st_fixed_buffer_size ?  in setup_buffering()
1524 				STp->block_size : st_fixed_buffer_size;  in setup_buffering()
1541 		if (STp->block_size)  in setup_buffering()
1542 			STbp->buffer_blocks = bufsize / STp->block_size;  in setup_buffering()
1589 	if (STp->block_size != 0 && (count % STp->block_size) != 0) {  in st_write()
1648 	if (STp->block_size != 0 &&  in st_write()
1664 	cmd[1] = (STp->block_size != 0);  in st_write()
1675 			if (STp->block_size == 0)  in st_write()
1678 				do_count = STbp->buffer_blocks * STp->block_size -  in st_write()
1693 		async_write = STp->block_size == 0 && !STbp->do_dio &&  in st_write()
1696 		if (STp->block_size != 0 && STm->do_buffer_writes &&  in st_write()
1706 		if (STp->block_size == 0)  in st_write()
1713 			blks /= STp->block_size;  in st_write()
1714 			transfer = blks * STp->block_size;  in st_write()
1744 				else if (STp->block_size == 0 &&  in st_write()
1749 				if (STp->block_size != 0)  in st_write()
1750 					undone *= STp->block_size;  in st_write()
1756 					if (STp->block_size)  in st_write()
1757 						blks = (transfer - undone) / STp->block_size;  in st_write()
1763 					if (STp->block_size == 0 ||  in st_write()
1778 								STp->block_size;  in st_write()
1808 			if (STp->block_size == 0)  in st_write()
1865 	if (STp->block_size == 0)  in read_tape()
1870 			bytes = blks * STp->block_size;  in read_tape()
1875 			blks = bytes / STp->block_size;  in read_tape()
1876 			bytes = blks * STp->block_size;  in read_tape()
1882 	cmd[1] = (STp->block_size != 0);  in read_tape()
1923 				if (STp->block_size == 0 &&  in read_tape()
1928 					if (STp->block_size == 0 &&  in read_tape()
1940 					} else if (STp->block_size == 0) {  in read_tape()
1956 						    STp->block_size;  in read_tape()
1972 					if (STp->block_size == 0)  in read_tape()
1976 						    bytes - transfer * STp->block_size;  in read_tape()
1985 					if (STp->block_size == 0)  in read_tape()
1989 						    bytes - transfer * STp->block_size;  in read_tape()
2027 		if (STp->block_size == 0)  in read_tape()
2030 			STps->drv_block += STbp->buffer_bytes / STp->block_size;  in read_tape()
2058 	if (STp->block_size != 0 && (count % STp->block_size) != 0) {  in st_read()
2145 		if (STp->block_size == 0)  in st_read()
2875 			ltmp = STp->block_size;  in st_int_ioctl()
2921 			STp->block_size = arg & MT_ST_BLKSIZE_MASK;  in st_int_ioctl()
2922 			if (STp->block_size != 0) {  in st_int_ioctl()
2924 				    (STp->buffer)->buffer_size / STp->block_size;  in st_int_ioctl()
3596 		    ((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) |  in st_ioctl()
3600 		if (STp->block_size != 0) {  in st_ioctl()
3603 				    (STp->buffer)->buffer_bytes / STp->block_size;  in st_ioctl()
3607                                          STp->block_size - 1) / STp->block_size;  in st_ioctl()
3638                     (STm->do_buffer_writes && STp->block_size != 0) ||  in st_ioctl()